Boss put right after error (6)
I believe the answer is:
gaffer
'boss' is the definition.
(gaffer can informally mean a boss)
'right after error' is the wordplay.
I cannot really understand how this works, but
'right' could be 'r' (common abbreviation) and 'r' is found in the answer.
'error' could be 'gaffe' (gaffe is a kind of error) and 'gaffe' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'put' is the link.
Can you help me to learn more?
(Other definitions for gaffer that I've seen before include "Superior" , "Informally, a boss or foreman" , "man in charge" , "Old man" , "one securing large fish" .)