Eventful game for the most part, with English heading for defeat (9)
I believe the answer is:
chequered
'eventful game' is the definition.
The answer and definition are different parts of speech. However, past participle verbs and adjectives occasionally mean the same thing.
'most part with english heading for defeat' is the wordplay.
I cannot quite understand how this works, but
'part' could be 're' (re is a kind of part) and 're' is located in the answer.
'english' could be 'e' (abbreviation) and 'e' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'for the' acts as a link.
Can you help me to learn more?
(Other definitions for chequered that I've seen before include "Like a chess board" , "with unreliable fortune" , "What professional chess player experiences may be" , "lifetime of ups and downs" , "Squared up" .)