Cryptic crossword clue
Sounding challenge to mount­aineer, money serious current issue 7,6

The most common and most likely answer to this crossword clue is the 14 letter word CLIMATE CHANGE

I've seen this crossword clue in The Guardian
C
L
I
M
A
T
E
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C
H
A
N
G
E

Buddy explains!

The straight part
We know that "serious current issue" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case serious current issue = climate change.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

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