OT patriarch’s account supporting another (5)
I believe the answer is:
isaac
'ot patriarch's' is the definition.
I can't judge whether this defines the answer.
'account supporting another' is the wordplay.
'account' becomes 'ac' (abbreviation for account).
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'another' becomes 'isa' (I can't explain this - if you can you should give a lot more credence to this answer).
'ac' put after 'isa' is 'ISAAC'.
Can you help me to learn more?
(Other definitions for isaac that I've seen before include "One nearly sacrificed" , "-- Asimov, sci-fi author" , "Hebrew patriarch" , "- Asimov, sci-fi writer" , "Youth almost sacrificed" .)