The most common and most likely answer to this crossword clue is the 7 letter word PERFORM
I've seen this crossword clue in The Guardian
P
E
R
F
O
R
M
More clues leading to the result PERFORM
- Be successful in each class
- Some style about supporting act
- In favour of interrupting hair treatment to play a part
- Act under compulsion to cancel church Mass
- A class act
- Hairdo holding for play
- Play for each class
- Stage exercises for drilling marines
- Present for each group of students …
- Effect of a protocol
Buddy explains!

The straight part
We know that "play" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case play = perform.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 PERFORM mean?
PERFORM verb- To do something; to execute.
- To do (something) in front of an audience, such as acting or music, often in order to entertain.