It's awkward when Clinton's off his head and a bother (3,2,4)
I believe the answer is:
ill at ease
'it's awkward' is the definition.
(I've seen this before)
'clinton's off his head and a bother' is the wordplay.
I cannot really understand how this works, but
'off' could be 'ill' and 'ill' is found in the answer.
'a' is within the answer.
The remaining letters 'tease' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'when' acts as a link.
Can you help me to learn more?
(Other definitions for ill at ease that I've seen before include "discomfited" , "wound up" , "Embarrassed" , "awkward" , "Nervous, uncomfortable" .)