Victor, chap in pain in alpine fall (9)
I believe the answer is:
avalanche
'alpine fall' is the definition.
'avalanche' can be an answer for 'fall' (I've seen this before). I am not certain of the 'alpine' bit.
'victor chap in pain' is the wordplay.
'victor' becomes 'V' (phonetic alphabet: alpha, bravo, charlie etc.).
'chap' becomes 'alan' (man's name).
'in' means one lot of letters goes inside another.
'pain' becomes 'ache' (ache is a kind of pain).
'v'+'alan'='valan'
'valan' going within 'ache' is 'AVALANCHE'.
'in' is the link.
Can you help me to learn more?
(Other definitions for avalanche that I've seen before include "flood" , "serious fall" , "Sudden overwhelming quantity" , "Landslide of snow" , "Rock-fall" .)