Delay stench suppressing endless wind (7)
I believe the answer is:
prolong
'delay' is the definition.
(thesaurus)
'stench suppressing endless wind' is the wordplay.
'stench' becomes 'pong' (I've seen this before).
'suppressing' indicates putting letters inside.
'endless' means to remove the last letter.
'wind' becomes 'roll' ('roll' can be a synonym of 'wind').
'roll' with its final letter taken off is 'rol'.
'pong' going around 'rol' is 'PROLONG'.
(Other definitions for prolong that I've seen before include "Lengthen in duration" , "Have extended" , "String out" , "Stretch out" , "Spin out" .)