Make love with partner after what starts off like mad (8)
I believe the answer is:
doolally
'starts off like mad' is the definition.
I can't tell whether this definition defines the answer.
'make love with partner after' is the wordplay.
'make love with' becomes 'dool' (I am not sure about this - if you are sure you should believe this answer much more).
'partner' becomes 'ally' (I've seen this in another clue).
'after' says to put letters next to each other.
'dool'+'ally'='DOOLALLY'
'what' acts as a link.
Can you help me to learn more?
(Other definitions for doolally that I've seen before include "Overexcited (informal)" , "Out of one's mind" , "potty" , "Mentally unbalanced, crazy" , "Out to lunch" .)