Perhaps describing bolts no longer stuck fast? (4,7,9)
I believe the answer is:
like greased lightning
'longer stuck fast?' is the definition.
The definition suggests an adjective which matches the answer.
'perhaps describing bolts no' is the wordplay.
I cannot quite understand how this works, but
'perhaps' could be 'eg' (for example) and 'eg' is found in the answer.
'no' could be 'n' (common abbreviation y/n) and 'n' is found in the answer.
This explanation may well be incorrect...
(Other definitions for like greased lightning that I've seen before include "characteristic of lubricated shafts" , "Extremely quickly" , "Very quickly indeed" , "Fast moving" .)