Last bits of clover to compost and decay (3)
I believe the answer is:
rot
'decay' is the definition.
(rot is a kind of decay)
'last bits of clover to compost' is the wordplay.
'last bits of' says to take the final letters.
The last letters of 'clover to compost' are 'ROT'.
'and' acts as a link.
(Other definitions for rot that I've seen before include "Balderdash" , "Paradise" , "Decomposition" , "Rhubarb" , "SECOND PART OF 25" .)