Mistake in Grid. What is shown as 16 is crossed. 17 is16; 18 is 17....
In grid, 15A last slot is crossed.
Across
1 Auditor at Los Angeles, America going west for short-term (6) (CA)(SU/AL<=)
4 Dad maybe leaves mom to lie around in couch (3,3)
9 Confront lawyer on rule point (4)
10 Reform at NATO by end of war to get electrical equipment (10)
11 Flowers found in Agra cemetery (6)
12 Extend support to admit new leader soon (8)
13 Abandoned in deep-sea, swam overcoming resistance and time (9)
15 Policemen plead guilty taking a dollar (4)
16 Trade wife for love with cleaner (4)
17 Iodine mixed in fertilizer, essentially new compound (9)
21 Shocking to see engineer’s son in morgue building (8)
22 Injured cadres are frightened (6)
24 Teaching technique to con fails miserably (5,5)
25 Basically safari is at a great distance (4)
26 Stinking, devious; describes Rommel partly (6)
27 Approver suspected to be holding against (6)
Down
1 Artists in an African country, finally trace a fake (7) {CHA(RA)D}E
2 Filed a case on top exporter of leather (5) SUED/E
3 Rookie appears in exam at Europe (7)
5 Broadcasting causes terrible migraine in essence (6) AIRING*
6 Charming lover's costume tailored is short by centimetre (9)
7 Doctor's partners heading off with shepherds (7)
8 Those little toes, cut in half, fitted in footwear (8,5) STILETTO HEELS*
14 According to report, scrap item is repaired during the period country is not at war (9)
16 Important issue or absurd... (7)
18 ...extract power likewise (7)
19 Ace opts to design reinforcements for boots (7)
20 Mrs. Leo hassled a bit (6)
23 Gather guards after morning at one (5)