Crossword Genius

Pride issue working with copper to infiltrate party? (4,3)

Ross

I believe the answer is:

lion cub

I'm a little stuck... Click here to teach me more about this clue!

'pride' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

'working with copper to infiltrate party?' is the wordplay.
'working' becomes 'on' (on can mean working or activated).
'with' means one lot of letters go next to another.
'copper' becomes 'cu' (chemical symbol).
'to infiltrate' indicates putting letters inside.
'party?' becomes 'lib' (abbreviation for Liberal, uk political party).
'on'+'cu'='oncu'
'oncu' inserted inside 'lib' is 'LION-CUB'.

'issue' acts as a link.

Can you help me to learn more?

(Other definitions for lion cub that I've seen before include "Baby feline" , "Elsa's offspring possibly (Born Free)" , "Young big cat" , "beastly prince?" , "Young pride member" .)

I've seen this clue in The Independent.
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