Hurried round fish, kept it moist (7)
I believe the answer is:
sprayed
'kept it moist' is the definition.
'hurried round fish' is the wordplay.
'hurried' becomes 'sped' ('speed' can be a synonym of 'hurry').
'round' indicates putting letters inside.
'fish' becomes 'ray' (ray is a kind of fish).
'sped' going around 'ray' is 'SPRAYED'.
(Other definitions for sprayed that I've seen before include "Sent out liquid in very small drops" , "showered" , "Sprinkled" .)