Solicitor having bite to eat in pub (6)
I believe the answer is:
beggar
'solicitor' is the definition.
(I've seen this before)
'bite to eat in pub' is the wordplay.
'bite to eat' becomes 'egg' (eggs are food).
'in' indicates putting letters inside.
'pub' becomes 'bar' (both are drinking establishments).
'egg' put into 'bar' is 'BEGGAR'.
'having' acts as a link.
(Other definitions for beggar that I've seen before include "Mendicant or humble supplicant" , "poor chap" , "One may entreat you" , "Pauper or supplicant" , "One lives by asking for money or food" .)