Offer excessive backing for military service action? (7)
I believe the answer is:
overarm
'service action?' is the definition.
'overarm' can be an answer for 'service' (I have seen 'Such service' mean 'overarm' so perhaps 'service' could also mean 'overarm'). I am not sure about the 'action?' bit.
'offer excessive backing for military' is the wordplay.
I cannot really understand how this works, but
'excessive' could be 'over' (over can mean in excess or excessively) and 'over' is found in the answer.
The remaining letters 'arm' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for overarm that I've seen before include "Bowling style" , "With hand raised above shoulder like cricket bowler" , "kind of delivery" , "Way to serve" , "Kind of bowling" .)