Has sad thoughts about a broken spine (7)

I believe the answer is:

repines

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'has sad thoughts' is the definition.
I can't tell whether this defines the answer.

'about a broken spine' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'a broken' indicates anagramming the letters.
'spine' with letters rearranged gives 'pines'.
're'+'pines'='REPINES'

Can you help me to learn more?

(Other definitions for repines that I've seen before include "Laments" , "frets" , "Peers in (anag.)" .)

I've seen this clue in the Evening Standard.

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