Coffee Break Cryptic

27 June

Across

1 A petty officer, say, reveals defector (8)
6 Better part of landscape (3)
9 Turning up with mother's cats (5)
10 Callas confused by a place where she sang (2,5)
11 Right conclusion? That's ripping! (7)
12 Noblemen needing laser treatment (5)
13 Primitive creature getting a second English degree? (6)
15 Mole responsible for decapitation of emperor? (6)
19 Class from Lancaster (5)
21 Ask family insistently for Halloween requirement (7)
23 Wind or unsettled weather (7)
24 Pooh's friend, extremely short, has place to sleep (5)
25 Pass on what could make an impression (3)
26 Signed up, having listened for a change (8)

Down

2 I'm in enclosure with last bits of hot jalapeño pepper (7)
3 South American greeting Japanese food (5)
4 Claim knotty legal point (6)
5 A street in dire need in part of London (4,3)
6 Be in charge of post at university (5)
7 Spare change for fruit (5)
8 Catches up with a Greek city-state (6)
14 Speak softly and be heart-broken (7)
16 Annoying smoker I put out (7)
17 Number swimming in Tyne (6)
18 Legal procedure, please (6)
19 Intimidated, we tucked into fish (5)
20 Kid influenced by sound (5)
22 Horses from the farm are saddled (5)