Gamble large choir will sing here (7)
I believe the answer is:
chancel
'choir will sing here' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'gamble large' is the wordplay.
'gamble' becomes 'chance' ('chance' can be a synonym of 'gamble').
'large' becomes 'l'.
'chance'+'l'='CHANCEL'
Can you help me to learn more?
(Other definitions for chancel that I've seen before include "where sanctuary may be found" , "space for choir" , "Clergy's area of the church" , "church, partly" , "screened-off area" .)