With backbone mostly fixed, queen's in good health for game (7,8)

'game' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

'with backbone mostly fixed queen's in good health' is the subsidiary indication.
'with' says to put letters next to each other.
'backbone' becomes 'chine' (chine is a kind of backbone).
'mostly' means to remove the last letter.
'fixed' becomes 'set' ('set' can be a synonym of 'fixed').
'queen's in good health' becomes 'chequers' (I can't justify this - if you can you should believe this answer much more).
'set' with its last letter taken off is 'se'.
'chine' next to 'se' is 'chinese'.
'chinese'+'chequers'='chinesechequers'

'for' is the link.

Can you help me to learn more?