Firmly established moped is for repair (7)
I believe the answer is:
imposed
'firmly established' is the definition.
'moped is for repair' is the wordplay.
'for repair' indicates anagramming the letters (I've seen this in other clues).
'moped'+'is'='mopedis'
'mopedis' is an anagram of 'IMPOSED'.
(Other definitions for imposed that I've seen before include "set as a task" , "Forced to be accepted" , "enforced" , "Thrust oneself upon" .)