Mild lady splitting a binder (7)
I believe the answer is:
clement
'mild' is the definition.
(similar in meaning)
'lady splitting a binder' is the wordplay.
'lady' becomes 'l' (this might be a standard abbreviation of which I'm unaware).
'splitting' means one lot of letters goes inside another (some letters split a word into two).
'a binder' becomes 'cement' (I've seen this before).
'l' placed within 'cement' is 'CLEMENT'.
Can you help me to learn more?
(Other definitions for clement that I've seen before include "Fine" , "Temperate" , "Mild or balmy" , "9, the chef and MP" , "With a harmed reputation" .)