Goblin has time to tumble (5)
I believe the answer is:
troll
'goblin' is the definition.
(I've seen this before)
'time to tumble' is the wordplay.
'time' becomes 't' (abbreviation).
'to tumble' becomes 'roll' (I can't justify this - if you can you should believe this answer much more).
't'+'roll'='TROLL'
'has' is the link.
Can you help me to learn more?
(Other definitions for troll that I've seen before include "Fish - gnome - sing" , "Bad fairy (giant or dwarf)" , "Legendary Norwegian dwarf (or giant)" , "Try to catch fish" , "Supernatural cave-dweller" .)