Trifling – like a naval officer? (5)
I believe the answer is:
petty
'trifling' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for petty that I've seen before include "Insignificant or trivial" , "Trifling" , "Trivial - small-minded" , "Insignificant and smallminded" , "Inferior" .)