I Prize Cryptic 1301

[maxidragon]

Just one left, 23a) Stage performer I tossed in river (9) I have f?c?o?i?a all help gratefully received, thankyou.

[scorpiojo]

F actor I al?

[gangesboy]

factorial ? f actor I al

[scorpiojo]

..is there a theme?

[maxidragon]

Thankyou< I'll have to revise 16d, but I think I'll cope!

[sunny-dave]

No theme. Scorps

The OP omitted a vital part of the clue - it ends with an exclamation mark!

Which is of course the symbol for factorial

A really good clue I think - made me smile when I just completed the crossword

Dxx

[bluey1977]

23a Pactolian. 16d mulching

[Mamyalynne]

How are you parsing that - I can see 'factorial'but not your suggestion.