Sure, a wild sloth returned to the landmass (7)
I believe the answer is:
eurasia
'the landmass' is the definition.
(Eurasia is an example)
'sure a wild sloth returned' is the wordplay.
'wild' indicates anagramming the letters.
'sloth' becomes 'ai' (ai is a kind of sloth).
'returned' shows that the letters should be reversed in order.
'ai' written backwards gives 'ia'.
'sure'+'a'='surea'
'surea' is an anagram of 'euras'.
'euras'+'ia'='EURASIA'
'to' is the link.
(Other definitions for eurasia that I've seen before include "Germany and Japan are in it" , "Landmass extending from Cape Roca in the west to Cape Dezhnev in the east" , "Large northern hemisphere land mass" , "Largest landmass" , "large part of world" .)