Student copied surrounding troublemakers in the end, no longer practising? (6)
I believe the answer is:
lapsed
'no longer practising?' is the definition.
(I've seen this before)
'student copied surrounding troublemakers in the end' is the wordplay.
'student' becomes 'L' (learner, as in L-plates for learner drivers).
'copied' becomes 'aped' ('ape' can be a synonym of 'copy').
'surrounding' is an insertion indicator.
'in the end' indicates one should take the final letters.
The last letter of 'troublemakers' is 's'.
'aped' going around 's' is 'apsed'.
'l'+'apsed'='LAPSED'
(Other definitions for lapsed that I've seen before include "Fallen away from the faith" , "No longer active or practising" , "Expired over pedals" , "Pleads, having failed to maintain standards" , "Expired, ran out" .)