Crossword Genius

Black sheep with a line on a cooker (7)

Ross

I believe the answer is:

bramley

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'a cooker' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'black sheep with a line' is the wordplay.
'black' becomes 'b' (abbreviation as in pencil classifications).
'sheep' becomes 'ram' (male sheep).
'with' says to put letters next to each other.
'a line' becomes 'ley' (as in ley lines).
'b'+'ram'+'ley'='BRAMLEY'

'on' is the link.

Can you help me to learn more?

(Other definitions for bramley that I've seen before include "Apple variety" , "Yorks. town; apple" , "Cooking apple" .)

I've seen this clue in The Daily Express.
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