Port merchant opposed to home rent rise? (7)
I believe the answer is:
vintner
'port merchant' is the definition.
'vintner' can be an answer for 'merchant' (vintner is a kind of merchant). I'm not certain of the 'port' bit.
'opposed to home rent rise?' is the wordplay.
'opposed to' becomes 'v' (abbreviation for versus).
'home' becomes 'in' ('he's home' can mean 'he's in').
'rise?' says the letters should be written backwards (I've seen 'rise' mean this).
'rent' back-to-front is 'tner'.
'v'+'in'+'tner'='VINTNER'
Can you help me to learn more?
(Other definitions for vintner that I've seen before include "Wine producer" , "Wine seller" , "A wine-merchant" , "one in red and white?" , "Wine merchant" .)