ACROSS
1 To experience the beginning of never-ending ecstasy, entering it is the answer (6) HEAVEN &lit{H{E}AVE}{N
4 Shows on the radio station (5) PLACE (~plays) Iffy homophone
8 A way to bind and make layers (8) STRATIFY {ST}{RATIFY}
9 Writer on the internet, say, answers a baffling question about beginning of time (6) POSTER {POS{T
11 Show extraordinary skill after coming back to expand a restaurant (9) TRATTORIA {TRA<=}T{TO}{RIA<=}
12 Party leader runs into trouble, gets time (5) APRIL {A{P
13 It's a deplorable old Indian practice (4) SATI*
14 Dust loosely getting settled eventually inside grand wooden framework (8) STUDDING {DUST*}{
18 To do away with a barrier, brother's breaking it (8) ABROGATE {A}{BRO}{GATE}
19 Friendly clash with Manchester to start with (4) WARM {WAR}{M
22 People's trust initially had by successor (5) THEIR {T
24 Cautioned about learning (9) EDUCATION*
25 Spoke of nothing with value, got bored finally (6) ORATED {O}{RATE}{
26 Dislike a story (8) AVERSION {A}{VERSION}
27 Girls prevailed over guys for the most part (5) WOMEN {WO{ME
28 Small list that's permanent (6) STABLE {S}{TABLE}
DOWN
1 In future, Helium energy may be conserved in a beam (9) HEREAFTER {HE}{R{E}AFTER}
2 Through Drona's tutelage gets sharp (6) ASTUTE [T]
3 Tear off somehow without a trouble (6) EFFORT {TE
5 Garments sold with rate slashed (8) LEOTARDS*
6 Provide for the empty vehicle parked outside (5) CATER {CA{T
7 Discussion with an expert with large ego, one from Kerala (12) PROLEGOMENON {PRO}{L{EGO}{MENON} New word for me.
8 It's a strange society, a section has no right to happiness (12) SATISFACTION {ITS+A}*{S}{F
10 Order that's not in order when stratified (5) CASTE
15 Make stuff like spaghetti? (9) ITALICISE [CD]
16 Endlessly violent with one woman, causing distress (8) AGGRIEVE {AGGR
17 Perfect state (5) UTTER [DD]
20 Bend, squat in the end and leap (6) CURVET {CURVE}{
21 City's engineers in South Africa and Great Britain (6) ZAGREB {ZA}{G{RE}B}
23 A time to muse (5) ERATO {ERA}{TO}
GRID