Extremely docile, weepy, moist (4)
I believe the answer is:
dewy
'moist' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for dewy that I've seen before include "laden with pearls" , "Wet with condensation" , "fresh in the morning?" , "Fresh early on" , "wet grass" .)