ACROSS
1 A drug district — space that's largely stoned (8,4) ASTEROID BELT {A}{STEROID} {BELT}
10 Section of epic cryptic by Exa (5) PIECE {EPIC*}{E}
11 It can nurse on destruction/loss of treasure, basically (9) INSURANCE {I
12 Clip hidden by dupatta-choli (6) ATTACH [T]
13 Collected CD having mix of love poems (8) COMPOSED {O+POEMS}* in {CD}
15 Saved penalty at the beginning by substitute, to get draw (9) PRESERVED {P}{RESERVE}{D}
16 Fledgelings have an advantage (4) EDGE [T]
20 English defenders' corners resulting in goals (4) ENDS {EN}{D
21 Advocate takes up second half of expert's broadcast (9) ADVERTISE {
24 Pressure's about making money at the start of business (8) COMMERCE {M
26 Film on fish extremely elegant (6) CARPET {CARP}{E
28 Mobile roaming — it means moving from one area to another! (9) MIGRATION*
29 New form of energy mostly environment-friendly (5) GREEN ENERG
30 Fellow criminal to portray me differently (12) CONTEMPORARY {CON}{PORTRAY+ME}*
DOWN
2 Protected the elders' ground (9) SHELTERED*
3 Hesitation standing in the way of duty/work (8) EXERCISE {ER} in {EXCISE}
4 Drop-out appears before American University (4) OMIT {O}{MIT}
5 Figured out Spinner's Across clue (twelve-lettered) finally (10) DISCOVERED {DISC}{OVER}{
6 Extraordinary Portuguese guts forgotten by France, Wales, Croatia etc. (6) EUROPE POR
7 Cast nets the other way, covering shelters (5) TENTS [T<=]
8 At the end, farmers beg for shower (5) SPRAY {
9 Prepares to scan items at regular intervals (7) READIES {READ}{I
14 Cover it up properly with some dress that's valuable (10) PRODUCTIVE {COVER+IT+UP+D
17 Setter's program gets appreciation after chief developers withdraw (9) DISAPPEAR {D
18 At heart, Joachim Loew unsettled by Spinner's greeting (7) WELCOME {
19 Holy man's row with religious head is more puzzling (8) STRANGER {ST}{RANGE}{R
22 Stay arrest on mother's intervention (6) REMAIN {MA} in {REIN}
23 Rock-strewn path on city's limit (5) STONY {ST}{ON}{
25 Wise men note skill (5) MAGIC {MAGI}{C}
27 Break for short siesta (4) SNAP {S}{NAP}