Mephisto N0 3138

[Matakari]

Hi there I'm stuck on the following and would like some answers
with parsing please! Thanks in advance!

DOWN:
1 That bloke is a “star” in decline (6) : H?SP?R ( HESPER ) ?
2 Duff up Yankee husky for a Scot (5) : ROOP?
7 Brings together (from Spenser) fully reversed furore (7): UP?NI?S (UPINIUS)?
9 Bargee who famously sat astride a chair the wrong way? (6) : KE?LE?
22 Excited and close to time to utterly dominate dormitories ( 6 ) : ?PT?WN
26 Internal security assumed by sterling fellow (6) : S?ST?R
Troll with inclination towards vehicle supporting dry sort? ( 5 ):?AGON
sort? (5)

[Mamyalynne]

9 (Christine) Keeler

[Mamyalynne]

2 Yes, Poor (duff), up

[Mamyalynne]

Last

Wag on

[Neveracrossword]

7 Upknits.

[Toorak]

2 roopy - poor (duff) reversed & y (Yankee)

[Matakari]

Many thanks, Mamyalynne, Toorak, Neveracrossword!
Any hints for 22 and 26 DOWN?

[Toorak]

26 initials of two words in clue inside abbreviation of sterling?

[Toorak]

22 the opposite of downtown?

[Matakari]

Thanks again, all, it's done now! Have a good evening!

[Neveracrossword]

Glad we got if finished!