Knight to spear great many (8)
I believe the answer is:
lancelot
'knight' is the definition.
(knight in Arthurian legends)
'spear great many' is the wordplay.
I cannot really understand how this works, but
'spear' could be 'lance' (synonyms) and 'lance' is present in the answer.
'many' could be 'lot' (a lot of something) and 'lot' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for lancelot that I've seen before include "Hero" , "Round Table knight who loved Guinevere" , "legendary knight" , "K?" , "Arthur's knight, lover of Guinevere" .)