Crossword Genius

Small swelling to decline (5)

Ross

I believe the answer is:

slump

'decline' is the definition.
(slump is a kind of decline)

'small swelling' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'swelling' becomes 'lump' (synonyms).
's'+'lump'='SLUMP'

'to' acts as a link.

(Other definitions for slump that I've seen before include "Sudden market drop" , "Sit badly" , "Sudden decline" , "Economic depression" , "Sudden fall as in share values" .)

I've seen this clue in The Mirror.
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