Bitter about the north? You may be this! (8)
I believe the answer is:
southern
'you may be this' is the definition.
The definition suggests a singular noun but the answer is not.
'bitter about the north?' is the wordplay.
'bitter' becomes 'sour' (I've seen this before**).
'about' means one lot of letters goes inside another.
'north?' becomes 'n' ('N' can be a synonym of 'north').
'sour' placed around 'the' is 'souther'.
'souther'+'n'='SOUTHERN'
Can you help me to learn more?
(Other definitions for southern that I've seen before include "From below the Mason-Dixon Line" , "Of Cork or Waterford, say" , "Austral" , "-- Cross, constellation" , "Towards the Antarctic" .)