I bury someone who's passed in an unconventional manner? (10)
I believe the answer is:
undertaker
'i bury' is the definition.
(undertakers bury people)
'someone who's passed in an unconventional manner?' is the wordplay.
I cannot really see how this works, but
'someone' could be 'taker' (taker is a kind of someone) and 'taker' is located in the answer.
The remaining letters 'under' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for undertaker that I've seen before include "He'll deal with passing" , "Funeral director" , "One passing dangerously" , "One making promises" .)