Rage gesture: "goodbye boss!" (1,6)

'goodbye boss' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'rage gesture' is the wordplay.
I cannot really understand how this works, but
'rage' could be 'ire' (ire is anger) and 'ire' is found in the answer.
'gesture' could be 'sign' (sign is a kind of gesture) and 'sign' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?