Puts finishing touches after cooking, to set dish (4,3,2)
I believe the answer is:
dots the is
'puts finishing touches' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'cooking to set dish' is the wordplay.
'cooking' indicates an anagram (cook can mean to falsify or distort).
'to'+'set'+'dish'='tosetdish'
'tosetdish' with letters rearranged gives 'DOTS THE IS'.
'after' acts as a link.
Can you help me to learn more?
(Another definition for dots the is that I've seen is " Ensures that all details are correct (well, half!)".)