Crossword Genius

Ancestor to handle a remnant roughly (11,3)

Ross

I believe the answer is:

neanderthal man

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'ancestor' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'handle a remnant roughly' is the wordplay.
'roughly' is an anagram indicator.
'handle'+'a'+'remnant'='handlearemnant'
'handlearemnant' with letters rearranged gives 'NEANDERTHAL MAN'.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for neanderthal man that I've seen before include "Chap around earlier" , "from prehistoric times, old chap" , "Primitive type" , "Cave-dweller" .)

I've seen this clue in The Daily Express.
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