Cold and wet, like seafood perhaps (6)
I believe the answer is:
clammy
'cold and wet' is the definition.
I can't judge whether this definition defines the answer.
'seafood perhaps' is the wordplay.
'seafood' becomes 'clam' (clam is a kind of seafood).
'perhaps' becomes 'my' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'clam'+'my'='CLAMMY'
'like' acts as a link.
Can you help me to learn more?
(Other definitions for clammy that I've seen before include "Dank" , "Wet and sticky" , "Moist and adhesive" , "Stewing" , "Cold and damp" .)