1: Agree to cross Rubicon for money (7)
5: He stirs up a one who had referred to him in the past. (7)
9: Perform part of play (3)
10: Black arts and demons concerned with Homer's issue? (4,7)
11: Dark, scary thing (5)
13: Bystanders are ready to see Queens (9)
14: A good friend to union, radical is not doing it for money (7)
16: Zoom back from the deeps (5)
18: Blasts most of eucalypt stumps (5)
19: Supporters, but not for long (7)
20: Concrete area covered by company's emergency equipment (4,5)
22: Comes last in frightfully easy assessment (5)
23: I see marks on jumbled party favors (11)
25: Vicar regularly outdated technology (1.1.1.)
26: Beneficiary of ticket sales, in general (7)
27: Singer Mel, not heartless, is suffering (7)