Notes fellow holding old lament (6)
I believe the answer is:
bemoan
'lament' is the definition.
(synonyms)
'notes fellow holding old' is the wordplay.
I cannot quite understand how this works, but
'notes' could be 'be' and 'be' is found within the answer.
'old' could be 'o' (common abbreviation eg in OE for Old English) and 'o' is located in the answer.
'fellow' could be 'man' (fellow can mean a man) and 'man' is found in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bemoan that I've seen before include "Deplore, lament" , "Lament, grieve" , "Complain about, lament" , "Regret, lament" .)