Nonsensical question right to be excised from holy work (4)
I believe the answer is:
koan
'nonsensical question' is the definition.
(paradoxical or nonsensical question in Buddhism)
'right to be excised from holy work' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to be excised from' indicates named letters should be taken away.
'holy work' becomes 'koran' (holy book in Islam).
'koran' with 'r' taken out is 'KOAN'.
(Other definitions for koan that I've seen before include "There's no reason for it" , "Zen paradox; OK, no (anag.)" , "Zen riddle" .)