Stop using toast in cooking (7)
I believe the answer is:
station
'stop' is the definition.
(I've seen this before)
'toast in cooking' is the wordplay.
'cooking' is an anagram indicator (cook can mean to falsify or distort).
'toast'+'in'='toastin'
'toastin' with letters rearranged gives 'STATION'.
'using' is the link.
(Other definitions for station that I've seen before include "Regular stopping place on transport system" , "Broadcaster" , "appointment" , "TV or radio channel" , "Small military base" .)