Sun Tel cryptic 2503

[chokkie]

I'm stuck on the last few of this one, hope someone can help, please
16d with respect to changes, known to select few(3,6) t?? ???r?t
17d organisation briefly judges philosopher(8) ?????t?s
20a addition to fare from Italy is nothing more than nuisance(5) ??s??
25a defender in squad initially one of the losers (not a keeper) (7) s???p??

Many thanks, C

[bookbinder]

16d. top secret (anagram of respect to).

[bookbinder]

17d Socrates (organisation briefly: soc(iety) judges (rates).

[chokkie]

Is 25a "sleeper" by any chance?

[Lie-in King]

16d Top secret - anag 'respect to'
17d Soc rates
20a Pest o
25a S weeper

[Jumbuck]

25a SWEEPER - s (squad initially) + weeper (finders keepers, losers weepers)

[bookbinder]

20a pesto

[chokkie]

Many thanks, folks. "sweeper", of course! C