Boss terribly hungover? Not he! (6)

I believe the answer is:

guvnor

'boss' is the definition.
(I know that guvnor is a type of boss)

'terribly hungover? not he' is the wordplay.
'terribly' indicates an anagram.
'not' suggests deleting specific letters.
'hungover' with 'he' removed is 'ungovr'.
'ungovr' anagrammed gives 'GUVNOR'.

(Another definition for guvnor that I've seen is " Boss (colloquial)".)

I've seen this clue in The Guardian.

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