Inadequate place to go in dirty dwelling (6)
I believe the answer is:
scanty
'inadequate' is the definition.
(I've seen this before)
'place to go in dirty dwelling' is the wordplay.
'place to go' becomes 'can' (place to go to the toilet).
'in' means one lot of letters goes inside another.
'dirty dwelling' becomes 'sty' (as in a pig sty).
'can' going inside 'sty' is 'SCANTY'.
(Other definitions for scanty that I've seen before include "Modest" , "brief" , "Spare" , "Give (to a good cause)" , "Meagre, deficient" .)