Searches show viral growth rising on vacant landfills (6)
I believe the answer is:
trawls
'searches show viral' is the definition.
I can't tell whether this definition defines the answer.
'growth rising on vacant landfills' is the wordplay.
'growth' becomes 'wart' (I've seen this before).
'rising' shows that the letters should be reversed in order (going up in a down clue).
'on' is a charade indicator (letters next to each other).
'vacant' says to hollow out the word (remove centre letters) (a vacant or emptied out form of the word).
'landfills' with its centre taken out is 'ls'.
'wart' reversed gives 'traw'.
'traw'+'ls'='TRAWLS'
Can you help me to learn more?
(Other definitions for trawls that I've seen before include "Fishes with a net dragged through the water" , "Makes sweeping search as with net" , "Fishes by dragging a net through water" , "Fishes with large drag-net" .)