Credulous, naive (4-4)
I believe the answer is:
wide-eyed
I believe this clue is a double definition.
'credulous' is the first definition.
(I've seen this before)
'naive' is the second definition.
(I've seen this before)
(Other definitions for wide-eyed that I've seen before include "Showing great surprise" , "Innocent - believing" , "Inexperienced; showing amazement" .)