Deviation of entitled man after spank (7)
I believe the answer is:
tangent
'deviation' is the definition.
(tangent can mean a deviation or digression)
'entitled man after spank' is the wordplay.
'entitled man' becomes 'gent' (gentleman - a man with a title).
'after' is a charade indicator (letters next to each other).
'spank' becomes 'tan' (I've seen this in another clue).
'gent' after 'tan' is 'TANGENT'.
'of' acts as a link.
(Other definitions for tangent that I've seen before include "seen to be touching" , "Straight line just touching a curve" , "A new line of thought" , "Particular line" , "Straight line resting on a circle" .)