Rest breaks around bad climbing frame (7)
I believe the answer is:
trellis
'frame' is the definition.
(trellis is a kind of frame)
'rest breaks around bad climbing' is the wordplay.
'breaks' indicates an anagram.
'around' is an insertion indicator.
'bad' becomes 'ill' (similar in meaning).
'climbing' shows that the letters should be reversed in order (in a down clue, letters climb up).
'ill' written backwards gives 'lli'.
'rest' anagrammed gives 'tres'.
'tres' enclosing 'lli' is 'TRELLIS'.
(Other definitions for trellis that I've seen before include "Structure supporting climbing plants" , "Rose clambers over this" , "Framework for creepers" , "latticework in the garden" , "Frame for creepers" .)