Two to go & would welcome some help please.
25ac Inexpressively play from end to end of mass (5) T?R?M Thrum? 23ac One-time king of sport administrators (4) ?F?A Ofra?
Definitely: that's THRU (from end to end, US spellin + M(ass), and OF F(ootball) A(ssociation). Offa was king of Mercia from 757 until his death in July 796, adn responsible for the dyke that bears his name between (more or less) Engalnd and Wales.