Lover boy barred from beerhouse on a regular basis (4)
I believe the answer is:
eros
'lover boy' is the definition.
(Greek love god)
'beerhouse on a regular basis' is the wordplay.
'on a regular basis' means one should take alternating letters.
The alternate letters of 'beerhouse' are 'EROS'.
'barred from' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
(Other definitions for eros that I've seen before include "Cupid's Greek alternative" , "Rose for the love-god" , "Winged god of love" , "Arrow-shooting god" , "Piccadilly 14 ac statue" .)