Calm down when cooking sausage (7)
I believe the answer is:
assuage
'calm down' is the definition.
(assuage can mean to calm down or relieve)
'cooking sausage' is the wordplay.
'cooking' indicates an anagram (cook can mean to falsify or distort).
'sausage' with letters rearranged gives 'ASSUAGE'.
'when' acts as a link.
(Other definitions for assuage that I've seen before include "Satisfy (an appetite)" , "Appease, calm" , "Mollify" , "allay hunger perhaps" , "Pacify, allay" .)