One has endless nuts for sloth (8)
I believe the answer is:
idleness
'sloth' is the definition.
(thesaurus)
'one has endless nuts' is the wordplay.
'one' becomes 'i' (Roman numeral).
'has' says to put letters next to each other.
'nuts' indicates an anagram (nuts can mean crazy).
'endless' with letters rearranged gives 'dleness'.
'i'+'dleness'='IDLENESS'
'for' acts as a link.
(Other definitions for idleness that I've seen before include "Inaction" , "Sloth - there may be love in it" , "Disinclination to work" , "Reluctance to work" , "pansy growers find love in?" .)