Faster RN manoeuvres for assignment (8)
I believe the answer is:
transfer
'for assignment' is the definition.
(thesaurus)
'faster rn manoeuvres' is the wordplay.
'manoeuvres' indicates anagramming the letters (letters manoeuvred in a new way).
'faster'+'rn'='fasterrn'
'fasterrn' with letters rearranged gives 'TRANSFER'.
(Other definitions for transfer that I've seen before include "Move from one team to another" , "Move something from one place to another" , "Move (something) across" , "a side to side movement in soccer, perhaps" , "Change (from one thing to another)" .)