Expert breaking suspect exposed bursar's rackets (7)
I believe the answer is:
uproars
'rackets' is the definition.
(I've seen this in another clue)
'expert breaking suspect exposed bursar's' is the wordplay.
'expert' becomes 'pro' (short for professional).
'breaking' means one lot of letters goes inside another.
'suspect' indicates an anagram (a suspicious or unusual spelling).
'exposed' indicates the central letters (outside letters removed).
The centre of 'bursar' is 'ursa'.
'ursa' with letters rearranged gives 'uars'.
'pro' inserted into 'uars' is 'UPROARS'.
(Other definitions for uproars that I've seen before include "rackets" , "Loud confused noises from many sources" , "Noisy commotions" , "Hubbubs, brouhahas" .)