Exercise machine reforming team drill (9)
I believe the answer is:
treadmill
'exercise machine' is the definition.
(I've seen this before)
'reforming team drill' is the wordplay.
'reforming' is an anagram indicator.
'team'+'drill'='teamdrill'
'teamdrill' is an anagram of 'TREADMILL'.
(Other definitions for treadmill that I've seen before include "Routine activity" , "Dreary round" , "Situation of routine drudgery" , "Dreary routine" , "Walk and move aimlessly" .)