Crossword Genius

Is able to move and descend mountain (6)

Ross

I believe the answer is:

abseil

I'm a little stuck... Click here to teach me more about this clue!

'descend mountain' is the definition.
I can't judge whether this defines the answer.

'is able to move' is the wordplay.
'to move' is an anagram indicator.
'is'+'able'='isable'
'isable' with letters rearranged gives 'ABSEIL'.

'and' acts as a link.

Can you help me to learn more?

(Other definitions for abseil that I've seen before include "Come down a rock face using ropes" , "let oneself down" , "go down the line" , "Use ropes to climb down a cliff face" , "Descend by rope from helicopter" .)

I've seen this clue in The Sun.
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