Forced into service - and unlikely to forget it (9)
I believe the answer is:
impressed
'service and unlikely to forget it' is the definition.
I can't judge whether this defines the answer.
'forced' is the wordplay.
I cannot quite see how this works, but
'forced' could be 'pressed' (press can mean to force or coerce) and 'pressed' is found in the answer.
The remaining letters 'im' 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).
'into' is the link.
Can you help me to learn more?
(Other definitions for impressed that I've seen before include "Greatly inspired" , "Drafted in" , "printed word?" , "Produced admiration or respect in someone" , "Affected favourably" .)