Digs plots of land, interrupted by poser (10)
I believe the answer is:
bedsitters
'digs plots' is the definition.
Although both the answer and definition are plural nouns, I cannot see how they can define each other.
'land interrupted by poser' is the wordplay.
'land' becomes 'beds' (I can't explain this - if you can you should give a lot more credence to this answer).
'interrupted by' indicates putting letters inside.
'poser' becomes 'sitter' (I have seen 'A poser' mean 'sitter' so perhaps 'poser' could also mean 'sitter').
'beds' placed around 'sitter' is 'BEDSITTERS'.
'of' is the link.
Can you help me to learn more?
(Other definitions for bedsitters that I've seen before include "Compact accommodation" , "cheap rooms?" .)