The most common and most likely answer to this crossword clue is the 5 letter word TELLS
I've seen this crossword clue in The Daily Telegraph
T
E
L
L
S
More clues leading to the result TELLS
Buddy explains!

The straight part
We know that "orders" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case orders = tells.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 TELLS mean?
TELLS noun- A reflexive, often habitual behavior, especially one occurring in a context that often features attempts at deception by persons under psychological stress (such as a poker game or police interrogation), that reveals information that the person exhibiting the behavior is attempting to withhold.
- That which is told; a tale or account.
- A private message to an individual in a chat room; a whisper.
- (archaic outside of idioms) To count, reckon, or enumerate.
- To narrate.
- To convey by speech; to say.
- To instruct or inform.
- To order; to direct, to say to someone.
- To discern, notice, identify or distinguish.
- To reveal.
- To be revealed.
- To have an effect, especially a noticeable one; to be apparent, to be demonstrated.
- To use (beads or similar objects) as an aid to prayer.
- To inform someone in authority about a wrongdoing.
- (authorship) To reveal information in prose through outright expository statement -- contrasted with show
- A hill or mound, originally and especially in the Middle East, over or consisting of the ruins of ancient settlements.