Cleverly procure first of wet fish (6)
I believe the answer is:
wangle
'cleverly procure' is the definition.
'wangle' can be an answer for 'procure' (thesaurus). I'm not certain of the 'cleverly' bit.
'first of wet fish' is the wordplay.
'first of wet' becomes 'w' (ast letter of 'wet').
'fish' becomes 'angle' (angle can mean to fish).
'w'+'angle'='WANGLE'
Can you help me to learn more?
(Other definitions for wangle that I've seen before include "Obtain or arrange by using trickery" , "Finagle" , "Obtain craftily" , "Contrive to get for oneself" , "Accomplish something by scheming or trickery" .)