Swiss mountain climbing? Severe, wanting new cover for wound (7)
I believe the answer is:
plaster
'cover for wound' is the definition.
'plaster' can be an answer for 'cover' (plastering is a kind of covering). I am unsure of the 'for wound' bit.
'swiss mountain climbing? severe wanting new' is the wordplay.
'swiss mountain' becomes 'alp' (I've seen this before).
'climbing?' says the letters should be written backwards (in a down clue, letters climb up).
'severe' becomes 'stern' (I've seen this in another clue).
'wanting' indicates named letters should be taken away (to want something can mean to lack it or need it).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'alp' written backwards gives 'pla'.
'stern' with 'n' taken out is 'ster'.
'pla'+'ster'='PLASTER'
Can you help me to learn more?
(Other definitions for plaster that I've seen before include "Sticky bandage" , "Small wound dressing" , "Wall finish - protection for cut" , "Smooth covering for walls and ceilings" , "First-aid item" .)