A few knights errant led by man into bonfire and so forth (3,6,5)

'bonfire and so forth' is the definition.
I can't judge whether this definition defines the answer.

'a few knights errant led by man' is the wordplay.
'errant' is an anagram indicator (errant can mean travelling or straying).
'led by' is a charade indicator (letters next to each other) (some letters go in front of others).
'man' becomes 'guy' (guy is a kind of man).
'a'+'few'+'knights'='afewknights'
'afewknights' with letters rearranged gives 'fawkesnight'.
'fawkesnight' put after 'guy' is 'GUY FAWKES NIGHT'.

'into' acts as a link.

Can you help me to learn more?