Criminal avails of what mouthy type produces (6)
I believe the answer is:
saliva
'what mouthy type produces' is the definition.
I can't judge whether this defines the answer.
'criminal avails' is the wordplay.
'criminal' indicates an anagram.
'avails' is an anagram of 'SALIVA'.
'of' is the link.
Can you help me to learn more?
(Other definitions for saliva that I've seen before include "Mouth moisture, spittle" , "Oral secretion" , "Clear liquid secreted into the mouth" , "body fluid" , "Liquid that moistens the mouth" .)