Waste and junk kept turning up on side of lane (9)
I believe the answer is:
devastate
'waste' is the definition.
(I've seen this before)
'junk kept turning up on side of lane' is the wordplay.
'junk' becomes 'tat' (I've seen this before).
'kept turning' becomes 'saved' (I can't justify this - if you can you should believe this answer much more).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'on side of' says to take the final letters (one of the side letters is used).
The last letter of 'lane' is 'e'.
'tat'+'saved'='tatsaved'
'tatsaved' in reverse letter order is 'devastat'.
'devastat'+'e'='DEVASTATE'
'and' is the link.
(Other definitions for devastate that I've seen before include "Lay waste or overwhelm with grief" , "Spoil" , "floor" , "Destroy" , "Lay waste or totally crush" .)