Stay away from First Lady over Bill (5)
I believe the answer is:
evade
'stay away from' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how they can define each other.
'first lady over bill' is the wordplay.
'first lady' becomes 'eve' (I've seen this before**).
'over' means one lot of letters goes inside another.
'bill' becomes 'ad' (advertisement stuck on wall).
'eve' placed around 'ad' is 'EVADE'.
Can you help me to learn more?
(Other definitions for evade that I've seen before include "Escape, avoid" , "Dodge (taxes)" , "Slyly escape" , "Circumvent, dodge" , "Illegally escape (taxes)" .)