Trifling with an officer, perhaps? (5)

I believe the answer is:

petty

I'm a little stuck... Click here to teach me more about this clue!

'trifling' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

(Other definitions for petty that I've seen before include "small" , "This cash is of a trivial amount" , "Marked by narrowness of mind" , "Small-time" , "Trifling" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app

Connecting...