Some of these make my teeth hurt; so, I decided to have fun with them. I looked at this source:
LSSU; though, many are my own pet peeves. I tried to up my cluing after the great comments on my last cryptic; I'm eager as always to hear your critique of this attempt, aiming to up your fun and enjoyment!
ACROSS
1A 2 MEANINGS 2 def.
6A CHARADE SE(GU)E
9A CHARADE TRAM + M + EL
10A ANAGRAM YON YOGI (anag.)
11A ANAGRAM NOTES (anag.)
12A &LIT A MATH OMEN (anag.)
13A CHARADE UN + EX + TRE(M)E
16A CHARADE DA(E)NK (rev.)
19A HIDDEN nava(HO SEA)nce
20A &LIT STRAP ORBS (anag.)
21A ANAGRAM TRAINEE TO (anag.)
24A ANAGRAM A TYPO (anag.)
25A 2 MEANINGS 2 def.
26A ANAGRAM SLUICE I (anag.)
27A CHARADE DI + ORD (rev.)
28A 2 MEANINGS 2 def.
DOWN
1D 2 MEANINGS 2 def.
2D ANAGRAM SCRAP SEXY (anag.)
3D HIDDEN s(LIM IT)em (hid.)
4D ANAGRAM GRAVE ILLS (anag.)
5D INITIALS L+A+Y+L+A
6D ANAGRAM TYKE ROCKS (anag.)
7D CHARADE GRIP + E
8D CHARADE w(EIGHT) − w
14D MIXED TRA(ANOIL)D (rev. holding anag.)
15D MIXED c(OTERIES) − c (hom.) + ES
17D ANAGRAM BY ROE SCAM (anag.)
18D HOMONYM DIAL LOGS (hom.)
21D HIDDEN d(OWN ED)ucation
22D CHARADE IN + ORT (rev.)
23D CHARADE ASKE(w) − w + R
24D HIDDEN s(POIL U)nexpected