Supernatural creature found in Angel Falls (3)
I believe the answer is:
elf
'supernatural creature' is the definition.
(I've seen this before)
'in angel falls' is the wordplay.
'in' says the answer is hidden in the clue.
'ELF' is hidden in the letters of 'angel falls'.
'found' acts as a link.
(Other definitions for elf that I've seen before include "Fairy-like creature" , "Woodland sprite" , "Goblin" , "Imp-like being" , "Folk tale creature" .)