Measured trainer and loafer? (9)
I believe the answer is:
slowcoach
'loafer?' is the definition.
(slowcoach is a kind of loafer)
'measured trainer' is the wordplay.
'measured' becomes 'slow' (I've seen this in another clue).
'trainer' becomes 'coach' (coach is a kind of trainer).
'slow'+'coach'='SLOWCOACH'
'and' acts as a link.
(Other definitions for slowcoach that I've seen before include "Person (or transport?) taking a long time" , "Not a fast worker" , "plodder" , "certainly not one of the fleet" , "Snail" .)