What hot weather does to tomatoes and other items? (8)
I believe the answer is:
sundries
This clue is a double definition.
'what hot weather does to tomatoes' is the first definition.
(as in sundried tomatoes)
'other items?' is the second definition.
(sundry items)
'and' is the link.
(Other definitions for sundries that I've seen before include "various small things" , "Extras" , "Various small items" , "range of items" , "Odds and ends" .)