The most common and most likely answer to this crossword clue is the 5 letter word ORDER
O
R
D
E
R
More clues leading to the result ORDER
- Group of monks giving command
- Instruct bishop to leave frontier
- Tell British to abandon frontier
- Architectural style of edging with no breadth
- Instruction to supply goods called for by the Speaker?
- Demand gold, another colour being sent back
- 12, 15 and 24 across all do this, 3 25
- Make neat edges after trimming each side
- King rode off before giving command
- With 1A, Ancien Régime giving command
Buddy explains!

The straight part
We know that "Tell" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tell = order.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ORDER mean?
ORDER noun- Arrangement, disposition, or sequence.
- A position in an arrangement, disposition, or sequence.
- The state of being well arranged.
- Conformity with law or decorum; freedom from disturbance; general tranquillity; public quiet.
- A command.
- A request for some product or service; a commission to purchase, sell, or supply goods.
- A group of religious adherents, especially monks or nuns, set apart within their religion by adherence to a particular rule or set of principles.
- An association of knights.
- Any group of people with common interests.
- A decoration, awarded by a government, a dynastic house, or a religious body to an individual, usually for distinguished service to a nation or to humanity.
- A rank in the classification of organisms, below class and above family; a taxon at that rank.
- A number of things or persons arranged in a fixed or suitable place, or relative position; a rank; a row; a grade; especially, a rank or class in society; a distinct character, kind, or sort.
- (chiefly plural) An ecclesiastical grade or rank, as of deacon, priest, or bishop; the office of the Christian ministry.
- The disposition of a column and its component parts, and of the entablature resting upon it, in classical architecture; hence (since the column and entablature are the characteristic features of classical architecture) a style or manner of architectural design.
- The sequence in which a side’s batsmen bat; the batting order.
- A power of polynomial function in an electronic circuit’s block, such as a filter, an amplifier, etc.
- The overall power of the rate law of a chemical reaction, expressed as a polynomial function of concentrations of reactants and products.
- The cardinality, or number of elements in a set, group, or other structure regardable as a set.
- (of an element of a group) For given group G and element g ∈ G, the smallest positive natural number n, if it exists, such that (using multiplicative notation), gn = e, where e is the identity element of G; if no such number exists, the element is said to be of infinite order (or sometimes zero order).
- The number of vertices in a graph.
- A partially ordered set.
- The relation on a partially ordered set that determines that it is, in fact, a partially ordered set.
- The sum of the exponents on the variables in a monomial, or the highest such among all monomials in a polynomial.
- A written direction to furnish someone with money or property; compare money order, postal order.
- To set in some sort of order.
- To arrange, set in proper order.
- To issue a command to.
- To request some product or service; to secure by placing an order.
- To admit to holy orders; to ordain; to receive into the ranks of the ministry.