Sleep outside house with right insect repellent (7)
I believe the answer is:
camphor
'insect repellent' is the definition.
(substance used as an insect repellent)
'sleep outside house with right' is the wordplay.
'sleep' becomes 'campo' (I can't explain this - if you can you should give a lot more credence to this answer).
'outside' is an insertion indicator (some letters go outside others).
'house' becomes 'h'.
'with' is a charade indicator (letters next to each other).
'right' becomes 'r' (common abbreviation).
'campo' placed around 'h' is 'campho'.
'campho'+'r'='CAMPHOR'
Can you help me to learn more?
(Other definitions for camphor that I've seen before include "Moth-repellent substance" , "Aromatic oil with medical uses" , "Liniment" , "Substance used to repel moths" , "Volatile substance used in insect repellents" .)