The most common and most likely answer to this crossword clue is the 6 letter word COMMON
I've seen this crossword clue in The Times
C
O
M
M
O
N
More clues leading to the result COMMON
- Butterfly with tail flying about open piece of land
- Usual trick, hiding ring and military medal
- You could go for a walk on this plain
- Frequently seen as vulgar
- Ordinary public land
- Public company taking thousands on
- & 2 Ailment making you green and frigid
- Usual uproar after Spanish uncle decamps
- Commander’s working routine
- Familiar sound of birds circling a short distance above Nelson’s head
Buddy explains!

The straight part
We know that "Usual" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case usual = common.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 COMMON mean?
COMMON noun- Mutual good, shared by more than one.
- A tract of land in common ownership; common land.
- The people; the community.
- The right of taking a profit in the land of another, in common either with the owner or with other persons; so called from the community of interest which arises between the claimant of the right and the owner of the soil, or between the claimants and other commoners entitled to the same right.
- To communicate (something).
- To converse, talk.
- To have sex.
- To participate.
- To have a joint right with others in common ground.
- To board together; to eat at a table in common.
- Mutual; shared by more than one.
- Occurring or happening regularly or frequently; usual.
- Found in large numbers or in a large quantity; usual.
- Simple, ordinary or vulgar.
- (grammar) In some languages, particularly Germanic languages, of the gender originating from the coalescence of the masculine and feminine categories of nouns.
- (grammar) Of or pertaining to common nouns as opposed to proper nouns.
- Vernacular, referring to the name of a kind of plant or animal, i.e., common name vs. scientific name.
- Profane; polluted.
- Given to lewd habits; prostitute.