Citrus tree almost devoured by cold weather (7)
I believe the answer is:
Here is my best explanation:
'weather' is the definition.
(I've seen this before)
'citrus tree almost devoured by cold' is the subsidiary indication.
'citrus tree' becomes 'lime' (lime is a kind of citrus tree).
'almost' means to remove the last letter.
'devoured' becomes 'ate' (I've seen this in other clues).
'by' means one lot of letters go next to another.
'cold' becomes 'c'.
'lime' with its last letter removed is 'lim'.
'limate' after 'c' is 'climate'.
(Other definitions for climate that I've seen before include "Mail, etc (anag.)", "Prevailing state", "Atmosphere", "Mood", "National weather conditions", "Weather conditions of a region", "Cite Mal (anag.)", "Long-term prevalent weather conditions", "Weather etc" and "Prevailing weather conditions".)