Men in suits? (7)
I believe the answer is:
tailors
'men in suits?' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'men in suits?' is the wordplay.
'men' becomes 'or' (military abbreviation for Other Ranks).
'in' is an insertion indicator.
'suits?' becomes 'tails' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'or' placed within 'tails' is 'TAILORS'.
Can you help me to learn more?
(Other definitions for tailors that I've seen before include "Designers" , "They make fitted clothes" , "Workers" .)