Panes broken at ski resort (5)
I believe the answer is:
aspen
'ski resort' is the definition.
(I've seen this in another clue)
'panes broken' is the wordplay.
'broken' indicates an anagram.
'panes' is an anagram of 'ASPEN'.
'at' acts as a link.
(Other definitions for aspen that I've seen before include "Type of poplar" , "Trembler" , "The tree that shivers in the slightest wind" , "Very timid" , "Trembling poplar tree" .)