Chap getting a poor share of a posh house (5)
I believe the answer is:
manor
'a posh house' is the definition.
'manor' can be an answer for 'house' (manor is a kind of house). I'm unsure of the 'a posh' bit.
'chap getting a poor share' is the wordplay.
'chap' becomes 'man' (chap can mean a man).
'getting' means one lot of letters go next to another.
'a poor share' becomes 'or' (I can't explain this - if you can you should believe this answer much more).
'man'+'or'='MANOR'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for manor that I've seen before include "Mansion of a wealthy person" , "Operational base" , "lord's home" , "Police district (slang)" , "house on estate" .)