Guilty perhaps some disciple admits (4)
I believe the answer is:
plea
'guilty perhaps' is the definition.
(I've seen this before)
'some disciple admits' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'PLEA' can be found hidden inside 'disciple admits'.
(Other definitions for plea that I've seen before include "Defendant's answer to a charge or claim" , "Statement in court" , "(and 14) Enjoyment - gratification" , "Lightly char" , "Dispute" .)