Compassion and passion may be about right (5)

I believe the answer is:

heart

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'compassion' is the definition.
(I've seen this in another clue)

'passion may be about right' is the wordplay.
'passion may' becomes 'hear' (I can't explain this - if you can you should believe this answer much more).
'right' suggests the final letters (the letter on the right of the word).
The final letter of 'about' is 't'.
'hear'+'t'='HEART'

'and' acts as a link.

Can you help me to learn more?

(Other definitions for heart that I've seen before include "Not a club" , "Centre; valour" , "Decorated (cake)" , "Core, courage" , "Muscular organ - compassion" .)

I've seen this clue in The Independent.

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