It gets down to sorting the list (7)
I believe the answer is:
thistle
'it gets down' is the definition.
The definition suggests a singular noun which matches the answer.
'sorting the list' is the wordplay.
'sorting' indicates an anagram.
'the'+'list'='thelist'
'thelist' anagrammed gives 'THISTLE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for thistle that I've seen before include "The Scottish weed?" , "Scotland's flower" , "symbol of Scotland" , "Lithest kind of prickly plant" , "Prickly weed" .)