One clued solution (which solvers must highlight) can be linked with eleven unclued solutions, (one in the plural). Brewer confirms them all, even showing that two of them can be further linked as a trio, thematically too!
 

Across

5    Character in Eliot drama, also in the saga that inspired it (6)
9    Maladjusted, he sued aunt for speedy carelessness (10, two words)
16    Primrose, perhaps, taking drug Vi slung out? (6)
17    A great deal of gas over Germany (5, two words)
20    Composer brought to court for judgment (7)
22    Bullies orchestra terribly, having lost artist (7)
24    One ducking the issue? (7)
25    Indian’s rejected fine material...