Drill with team smashing exercise machine (9)
I believe the answer is:
treadmill
'exercise machine' is the definition.
(I've seen this before)
'drill with team smashing' is the wordplay.
'with' means one lot of letters go next to another.
'smashing' indicates anagramming the letters.
'drill' after 'team' is 'teamdrill'.
'teamdrill' with letters rearranged gives 'TREADMILL'.
(Other definitions for treadmill that I've seen before include "Boring or unending job" , "Power-generating wheel" , "Laborious routine" , "tedious work" , "Endlessly tedious job" .)