Crossword Genius

Pine not turning up: it's worth thousands of pounds (4,3)

Ross

I believe the answer is:

long ton

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

'worth thousands of pounds' is the definition.
I can't judge whether this defines the answer.

'pine not turning up' is the wordplay.
'pine' becomes 'long' (to pine for something is to long for it).
'turning up' says the letters should be written backwards.
'not' backwards is 'ton'.
'long'+'ton'='LONG TON'

'it's' acts as a link.

Can you help me to learn more?

(Another definition for long ton that I've seen is " 2240 lbs".)

I've seen this clue in The Guardian.
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