Effusively or insincerely emotional (7)
I believe the answer is:
maudlin
'effusively or insincerely emotional' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for maudlin that I've seen before include "Mushy and emotional" , "Over-emotional" , "Sentimentally tearful" , "Weakly sentimental" , "Schmaltzy" .)