Porter's home from pub (8)
I believe the answer is:
alehouse
'pub' is the definition.
(alehouse is a kind of pub)
'porter's home' is the wordplay.
'porter' becomes 'ale' (I've seen this in other clues).
'home' becomes 'house' (I've seen this before).
'ale'+'house'='ALEHOUSE'
'from' acts as a link.
(Other definitions for alehouse that I've seen before include "Inn" , "old tavern" , "Hostelry (of old)" , "the nineteenth?" , "Old pub" .)