Tall vampire — he'd worked for Dracula (4,3,7)

I believe the answer is:

vlad the impaler

'dracula' is the definition.
(I've seen this before)

'tall vampire he'd worked' is the wordplay.
'worked' indicates anagramming the letters.
'tall'+'vampire'+'hed'='tallvampirehed'
'tallvampirehed' anagrammed gives 'VLAD THE IMPALER'.

'for' acts as a link.

(Another definition for vlad the impaler that I've seen is " Dracula".)

I've seen this clue in The Times.

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