Lizard found in Antigua, naturally (6)
I believe the answer is:
iguana
'lizard' is the definition.
(iguana is a kind of lizard)
'in antigua naturally' is the wordplay.
'in' says the answer is hidden in the clue.
'IGUANA' is hidden in the letters of 'antigua naturally'.
'found' is the link.
(Other definitions for iguana that I've seen before include "reptile" , "Something like a monitor" , "Animal" , "American lizard with a spiny crested back" , "Large tree-climbing specimen of 5 down in tropical America" .)