Sentimental and terribly wet, note (4)
I believe the answer is:
twee
'sentimental' is the definition.
(I've seen this before)
'terribly wet note' is the wordplay.
'terribly' indicates anagramming the letters.
'note' becomes 'e' (musical note).
'wet' with letters rearranged gives 'twe'.
'twe'+'e'='TWEE'
'and' is the link.
(Other definitions for twee that I've seen before include "Sentimental, quaint" , "Overly cute" , "Rather too pretty" , "Affectedly cute" , "Small and sweet (colloq.)" .)