Minor attraction mounted (4)
I believe the answer is:
ward
'minor' is the definition.
(I've seen this in other clues)
'attraction mounted' is the wordplay.
'attraction' becomes 'draw' ('draw' can be a synonym of 'attraction').
'mounted' is a reversal indicator.
'draw' in reverse letter order is 'WARD'.
(Other definitions for ward that I've seen before include "Separate room" , "Minor in the charge of a guardian" , "Electoral district; Mrs Humphry ---" , "Hospital room; part of borough" , "Doctor in 5A 1D [PROFUMO AFFAIR]" .)