Confuse it with deceit about eating behaviour (8)
I believe the answer is:
dietetic
'eating behaviour' is the definition.
'dietetic' can be an answer for 'eating' (thesaurus). I'm unsure of the 'behaviour' bit.
'confuse it with deceit' is the wordplay.
'confuse' indicates an anagram.
'with' says to put letters next to each other.
'it' after 'deceit' is 'deceitit'.
'deceitit' anagrammed gives 'DIETETIC'.
'about' is the link.
Can you help me to learn more?
(Other definitions for dietetic that I've seen before include "it's to do with what you eat" , "relating to food intake" , "of nutrition" .)