Live with mistress? Husband in bed excited (5,2)
I believe the answer is:
shack up
'live' is the definition.
(I know that live is a is a kind of of shack up)
'mistress? husband in bed excited' is the wordplay.
I cannot quite see how this works, but
'husband' could be 'h' (abbreviation) and 'h' is found within the answer.
'bed' could be 'sack' (e.g. 'in the sack') and 'sack' is found in the remaining letters.
'excited' could be 'up' and 'up' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'with' is the link.
Can you help me to learn more?
(Another definition for shack up that I've seen is " Start to live together (with)".)