Someone experienced and with former husband (3,4)
I believe the answer is:
old hand
'someone' is the definition.
(old hand is a kind of someone)
'experienced and with former husband' is the wordplay.
'experienced' becomes 'old' (associated in meaning).
'with' means one lot of letters go next to another.
'former husband' becomes 'h' (I am not sure about the 'former' bit.).
'and' put after 'h' is 'hand'.
'old'+'hand'='OLD HAND'
Can you help me to learn more?
(Other definitions for old hand that I've seen before include "mediaeval script" , "Experience or well-practised person" , "expert?" , "Someone very experienced" , "Experienced or well-practised person" .)