Hit action man? No sweat (3)
I believe the answer is:
ram
'hit' is the definition.
'action man? no sweat' is the wordplay.
'action man?' becomes 'rambo'.
'no' indicates named letters should be taken away.
'sweat' becomes 'bo' (body odour).
'rambo' with 'bo' removed is 'RAM'.
(Other definitions for ram that I've seen before include "needed for PC" , "Crash into, maybe for battering" , "store for computers" , "Male animal; stuff" , "farm animal" .)