Happiness day I presume for all those who wanted it that way ;-)
ACROSS
1 T uber in a vessel at examination (6) POTATO {POT}{AT}{O}
4 H unts the wayward actress who lost direction (6) TRACES ACTRESs* Mistake needs to be TRACED !
9 E xcitable calibre man has? No, just the opposite (4) CALM {CAL}{M}
10 T he braless served up in suspense (10) BREATHLESS*
12 E nforces exodus at El Salvador to capture the darling (8) EXECUTES {EX}{E{CUTE}S}
13 N o end for sloppy chances to get fungi (9) MUSHROOMS {MUSHy}{ROOMS}
15 T rousers police sergeant wore had insect inside (5) PANTS {P{ANT}S} Imagine a policeman with ants in his pants!!
16 Y ou enter pub from back entrance with nothing outside and take over (3,2) BUY UP {B{UoY} UP}<=
18 F ree peacekeepers by bay accosting communists (9) UNCOVERED {UN}{COVE}{RED}
22 I mmoral fellows at the bar found in the cellar (8) BASEMENT {BASE}{MEN}{T}
23 F ullness seen in outside practice specialist has (6) PLENTY {PL{ENT}Y}
25 T rains via Ohio derail on departures (10) VARIATIONS {TRAINS+VIA+O}* O for Ohio?
26 H ummed a saying unknown setter left outside (4) SANG SAyiNG
27 G ives Evelyn a facelift symmetrically (6) EVENLY*
28 R eformed slut follows condition of grown-ups (6) ADULTS {AD}{SLUT*} What condition is AD? See comments
DOWN
1 I llustration on gold table (7) PLATEAU {PLATE}{AU}
2 D ischarged upset pilot officer on time (5) TEMPO {TEM<=}{PO}
3 T o nearly withdraw Commanding Officer with cigarette? (7) TOBACCO {TO}{BACk}{CO} Is injurious to health
5 H arassed marathoner left riotous Oman by preference (6) RATHER maRATHonER*
6 A cute call made to plan (9) CALCULATE*
7 N ew timidness I’m taking out from protest (7) DISSENT TimIDNESS*
8 K iller instinct seen from French end (13) DETERMINATION {DE}{TERMINATION}
14 S pouse to store sewing items perhaps? (9) HOUSEWIFE [DD]
17 F lummoxed warehouseman misses dilapidated homes in the dark (7) UNAWARE WAREhoUsemAN*
19 O bstructed work submitted (7) OPPOSED {OP}{POSED}
20 L engthens former spouse’s care on Sunday (7) EXTENDS {EX}{TEND}{S}
21 K inky lad hugs specialist of teeth (6) DENTAL {D{ENT}AL*}
24 S ee Los Angeles differently through a frame (5) EASEL {SEE+LA}*