Lawyer railing about strict limits (9)
I believe the answer is:
barrister
'lawyer' is the definition.
(barrister is a kind of lawyer)
'railing about strict limits' is the wordplay.
'railing' becomes 'barrier' (railing can mean a bar or barrier).
'about' means one lot of letters goes inside another.
'limits' means to remove the middle letters.
'strict' with its middle taken out is 'st'.
'barrier' enclosing 'st' is 'BARRISTER'.
(Other definitions for barrister that I've seen before include "Legal advocate, must be briefed" , "member of an inn" , "One taking brief" , "One represents clients in court" , "Court lawyer" .)