Make spit obtained from vital sea (8)
I believe the answer is:
salivate
'make spit' is the definition.
(to salivate is to produce saliva)
'from vital sea' is the wordplay.
'from' indicates anagramming the letters (from the letters).
'vital'+'sea'='vitalsea'
'vitalsea' anagrammed gives 'SALIVATE'.
'obtained' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for salivate that I've seen before include "Become moist in mouth" , "Lisa a vet (anag.)" , "Water at the mouth" , "Produce moisture in mouth" , "Drool" .)