Though dried, is covered in water! (6)
I believe the answer is:
raisin
'though dried is covered in water' is the definition.
I can't tell whether this definition defines the answer.
'is covered in water' is the wordplay.
'covered in' indicates putting letters inside.
'water' becomes 'rain' (rain is a kind of water).
'is' placed into 'rain' is 'RAISIN'.
Can you help me to learn more?
(Other definitions for raisin that I've seen before include "Fruit for the Christmas cake" , "Somewhat dry fruit" , "Partially dried grape" , "Cultivating" , "A dried grape, nice in cake" .)