Here's an idea for cooking with a new wok (1,4,4)
I believe the answer is:
i know what
'here's an idea' is the definition.
(both might be said before introducing a suggestion)
'cooking with a new wok' is the wordplay.
'cooking' is an anagram indicator (cook can mean to falsify or distort).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'withanwok' anagrammed gives 'I KNOW WHAT'.
'for' is the link.
(Another definition for i know what that I've seen is " How about this".)