Old man cracked nut (6)

I believe the answer is:

almond

'nut' is the definition.
(almond is a kind of nut)

'old man cracked' is the wordplay.
'cracked' indicates an anagram.
'old'+'man'='oldman'
'oldman' with letters rearranged gives 'ALMOND'.

(Other definitions for almond that I've seen before include "Oval-shaped nut" , "Nut-like kernel" , "Fruit for marzipan" , "Edible nut" , "Oval-shaped edible seed" .)

I've seen this clue in The Sun and The Times.

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