Crossword Genius

Sounding challenge to mount­aineer, money serious current issue (7,6)

Ross

I believe the answer is:

climate change

'serious current issue' is the definition.
(global issue)

'sounding challenge to mountaineer money' is the wordplay.
'sounding' shows a homophone (sound like).
'challenge to mountaineer' becomes 'climb it' (challenge to climb a mountain).
'money' becomes 'change' (I've seen this in other clues).
'climbit' is a homophone of 'climate'.
'climate'+'change'='CLIMATE CHANGE'

(Other definitions for climate change that I've seen before include "Effect of 1" , "global warming" .)

I've seen this clue in The Guardian.
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