Impoverished person’s urge to enter pub (6)
I believe the answer is:
beggar
'impoverished person's urge to enter pub' is the definition.
I can't tell whether this defines the answer.
'urge to enter pub' is the wordplay.
'urge' becomes 'egg' (as in egging someone on).
'to enter' indicates putting letters inside.
'pub' becomes 'bar' (both are drinking establishments).
'egg' inserted into 'bar' is 'BEGGAR'.
Can you help me to learn more?
(Other definitions for beggar that I've seen before include "Exhaust resources" , "Mendicant or cadger" , "Pauper or supplicant" , "Pauper who lives by soliciting" , "Solicitor" .)