Times will support oddly viable mountain dweller (4)
I believe the answer is:
ibex
'mountain dweller' is the definition.
(type of mountain-dwelling goat)
'times will support oddly viable' is the wordplay.
'times' becomes 'x' (multiplication sign).
'will support' is a charade indicator (letters next to each other).
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternate letters of 'viable' are 'ibe'.
'x' put after 'ibe' is 'IBEX'.
(Other definitions for ibex that I've seen before include "Mountain goat with long curved horns" , "Large-horned mountain goat" , "Mountain animal" , "Mountain-goat" , "Come out of an egg" .)