Going beyond the usual limits to get extra bit on suspect (10)
I believe the answer is:
exorbitant
'going beyond the usual limits' is the definition.
'extra bit on suspect' is the wordplay.
'suspect' is an anagram indicator.
'extra'+'bit'+'on'='extrabiton'
'extrabiton' with letters rearranged gives 'EXORBITANT'.
'to get' is the link.
(Other definitions for exorbitant that I've seen before include "Unreasonable" , "High cost" , "overpriced" , "Exceeding the bounds of reason" , "going beyond the limits?" .)