Only partially sanguine about money (6)

I believe the answer is:

guinea

'money' is the definition.
(I've seen this before)

'only partially sanguine about' is the wordplay.
'only partially' indicates a hidden word.
'GUINEA' is hidden within 'sanguine about'.

(Other definitions for guinea that I've seen before include "some land" , "Old sum of money - west African republic" , "State" , "Old piece" , "105 pence" .)

I've seen this clue in The Sun.

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