Small county with unlimited accommodation (6)
I believe the answer is:
bedsit
'accommodation' is the definition.
(I've seen this before)
'small county with unlimited' is the wordplay.
'small county' becomes 'beds' (abbreviation for Bedfordshire; 'small' indicates a short form).
'unlimited' indicates the central letters (discard the edges or 'limits' of the word).
The middle letters of 'with' are 'it'.
'beds'+'it'='BEDSIT'
(Other definitions for bedsit that I've seen before include "One-roomed apartment" , "One-roomed flat, in short" , "Rented room with all facilities" , "Room to accommodate" , "One-room home" .)