Weakly sentimental (7)
(Other definitions for mawkish that I've seen before include "Effusively or insincerely emotional" , "Cloying" , "Soppy" , "Insipid; maudlin" , "Falsely sentimental" .)
'weakly sentimental' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for maudlin that I've seen before include "Weepy (and intoxicated?)" , "Soppy, lachrymose" , "Self-pityingly" , "Foolishly tearful" , "Mawkish" .)