Times 25311

[bigdave1954]

Stuck on three.

6a On fifth of August a person used to set off s?a?n

24a Possible Russian band leader in America s?s?a

25a Listened in Conference perhaps, powerless, as judge e?r?i?g?d

Thanks in anticipation

[Captain2]

25a Earwigged

[vetuste_ennemi]

sash + A.
[augu]s[t] + pawn

[bigdave1954]

Thanks folks

[offramp_t]

vetuste_ennemi; that wordplay had not occured to me - I finally cracked this clue, the penultimate one I answered (SPAWN was the last), by another route.
I took the band leader in America to be Alexander, of Ragtime Band fame. Alexander is long for Sasha - so that was my answer. I hadn't seen the neat ordinary wordplay at all.

Good clue!