Unaided by a sub, by all accounts (5)
I believe the answer is:
alone
'unaided by a sub by all accounts' is the definition.
I can't judge whether this defines the answer.
'unaided by a' is the wordplay.
'unaided' becomes 'lone' (I've seen this in another clue).
'by' says to put letters next to each other.
'lone' after 'a' is 'ALONE'.
Can you help me to learn more?
(Other definitions for alone that I've seen before include "unique" , "Solo" , "without another" , "Without anybody or anything else" , "On one's own" .)