Lofty's 'prior use' rumpus (8)
I believe the answer is:
Here is my best explanation:
'lofty's' is the definition.
'prior use rumpus' is the wordplay.
'rumpus' indicates anagramming the letters (rumpus can mean a disturbance).
'prioruse' with letters rearranged gives 'SUPERIOR'.
(Other definitions for superior that I've seen before include "head of a religious order", "Snobbish", "Monastic head", "Higher in position or rank", "Largest of the Great Lakes", "Boss", "Having higher rank or better skills", "Snooty", "Of better quality, like American lake" and "One of higher rank".)