Legal centre for solicitor (5)
I believe the answer is:
licit
'legal' is the definition.
(similar in meaning)
'centre for solicitor' is the wordplay.
'centre for' says to take the centre.
The central letters of 'solicitor' are 'LICIT'.
(Other definitions for licit that I've seen before include "Legal" , "in order" , "Sanctioned" , "Allowable" , "OK?" .)