Gas traps both sides of large wooden villa (6)
I believe the answer is:
chalet
'wooden villa' is the definition.
(I've seen this before)
'gas traps both sides of large' is the wordplay.
'gas' becomes 'chat' (both can mean to talk).
'traps' indicates putting letters inside.
'both sides of' suggests removing the centre (only the letters on the sides remain).
'large' with its centre taken out is 'le'.
'chat' going around 'le' is 'CHALET'.
(Other definitions for chalet that I've seen before include "small house" , "A Swiss mountain cottage" , "Kind of mountain cabin in Switzerland" , "Small hut in holiday camp" , "Wooden house of Swiss origin" .)