Childlike (4-4)
I believe the answer is:
dewy-eyed
'childlike' is the definition.
(I know that childlike can be written as dewy-eyed)
This is all the clue.
(Other definitions for dewy-eyed that I've seen before include "Lovingly, naively trustful" , "Teary" , "Affected by nostalgic or sentimental tears?" , "Seeming rather tearful" , "Romantically naive - on the verge of tears" .)