12a Literary commentator (9)
A???T?T??
25a An expanse of open level country (9)
?H?M?A?G? (champaign ?)
33a The upper-arm muscle that straightens the elbow (7)
BRACH??
2d Small flags used in surveying (7)
F???A?S
5d Advocates of the return to Italy of all Italian-speaking districts subject to others’ control (12)
I???D?E?I?T?
23d Alekhine, Capablanca and Euwe, eg (5,7)
CHESS ??A?E?S