Sentimental old lady having desire to embrace king (7)
I believe the answer is:
Here is my best explanation:
'sentimental' is the definition.
('mawkish' can be a synonym of 'sentimental')
'old lady having desire to embrace king' is the subsidiary indication.
'old lady' becomes 'ma'.
'having' means one lot of letters go next to another.
'desire' becomes 'wish' (wish is a kind of desire**).
'to embrace' means one lot of letters goes inside another.
'king' becomes 'k'.
'wish' going around 'k' is 'wkish'.
(Other definitions for mawkish that I've seen before include "Effusively or insincerely emotional", "Maudlin", "Sentimental in maudlin way", "Sentimental, schmaltzy", "Cloying", "Falsely sentimental", "very soppy", "Schmaltzy", "Insincerely emotional" and "Soppy".)