Locks attached here but clasp broken (5)

I believe the answer is:

scalp

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'locks attached here' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'clasp broken' is the wordplay.
'broken' is an anagram indicator.
'clasp' anagrammed gives 'SCALP'.

'but' acts as a link.

Can you help me to learn more?

(Other definitions for scalp that I've seen before include "Clasp (anag)" , "Hair producer" , "Skin with hair as trophy" , "Trophy signifying conquest" , "Cut hair very short" .)

I've seen this clue in the Evening Standard and The Sun.

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