I'm going to answer guy that's awkward (3,2,4)
I believe the answer is:
ill at ease
'awkward' is the definition.
(ill at ease can mean awkward or uncomfortable)
'i'm going to answer guy' is the wordplay.
'i'm going to' becomes 'I'll' ('I'm going to' can mean 'I will' or 'I'll').
'answer' becomes 'a' (abbreviation eg in Q and A).
'guy' becomes 'tease' (I've seen this in another clue).
'ill'+'a'+'tease'='ILL-AT-EASE'
'that's' is the link.
(Other definitions for ill at ease that I've seen before include "Unsure and constrained in manner" , "awkward" , "Embarrassed" , "On edge" , "Fidgety" .)