Old G-man with a stutter is taken out (5)

'taken out' is the definition.
Both the definition and answer are past participle verbs.
Perhaps there's an association between them I don't understand?

'old g-man with a stutter' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'g-man' becomes 'fed' (I've seen this in another clue).
'with' means one lot of letters go next to another.
'a stutter' becomes 'f' (I can't explain this - if you can you should give a lot more credence to this answer).
'fed' after 'f' is 'ffed'.
'o'+'ffed'='OFFED'

'is' acts as a link.

Can you help me to learn more?