Master etched a hare badly (4,7)

I believe the answer is:

head teacher

'master' is the definition.
(I know that master can be written as head teacher)

'etched a hare badly' is the wordplay.
'badly' indicates anagramming the letters (letters in the wrong order).
'etched'+'a'+'hare'='etchedahare'
'etchedahare' with letters rearranged gives 'HEAD TEACHER'.

(Another definition for head teacher that I've seen is " School principal".)

I've seen this clue in The Mirror.

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