Particular house in warm and friendly environment (6)
I believe the answer is:
choosy
'particular' is the definition.
(synonyms)
'house in warm and friendly environment' is the wordplay.
I cannot quite understand how this works, but
'house' could be 'ho' (abbreviation for house) and 'ho' is found in the answer.
The remaining letters 'cosy' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for choosy that I've seen before include "Difficult to please" , "Picky or particular" , "Fastidious, finicky" , "Selective" , "Fussy, particular" .)