She can crack a nut (4)

I believe the answer is:

aunt

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'she' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

'crack a nut' is the wordplay.
'crack' indicates an anagram.
'a'+'nut'='anut'
'anut' is an anagram of 'AUNT'.

'can' acts as a link.

Can you help me to learn more?

(Other definitions for aunt that I've seen before include "Family member" , "Female relative" , "Put up with" , "Tuna for the odd relative" , "Tuna gone bad for the relative" .)

I've seen this clue in the Evening Standard.

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