Inclined to be half asleep, Pontiff stripped of original power (6)
I believe the answer is:
aslope
'inclined' is the definition.
('aslope' can be similar in meaning to 'inclined')
I don't understand the remainder of the clue.
(Other definitions for aslope that I've seen before include "Not flat" , "not on the level" , "italic" , "Leaning" , "Inclined" .)