SUNTEL CRYPTIC 2524

[FIERYFRANK]

stumped.....12a task orientated groups improperly taking power, sir? (7,7) - - - - - - - - - - - i - s
28a how teams changed, up to a point (8) - - - - w - - -
8d discriminating, again imposed legal punishment (7) r - - - - - -
18d police with weapon that was used to punish mutineers (7) - -r - a - -

I know this is a cryptic crossword, but I'm going gaga with it, any help very welcome.....

[novalis]

working parties
somewhat
refined
yardarm

[Sandy-Wroe]

18d Yardarm

[Lie-in King]

12a Working parties - anag 'taking power sir'
28a Somewhat - anag 'how teams'
8d Re-fined
18d Yard-arm

[FIERYFRANK]

phew.... many thanks to you all, and thanks for the explanations. Enjoy the rest of the weekend! regards, ff