Cryptic crossword 28

By Hubble

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Across
1Peter joins sentry for protection (9)
6Alumnus following vehicle to tree (5)
9A gypsy scent (5)
10What telephonists often say quietly, leaving right to tenure (9)
11Man's vote for training location (5,5)
12Collection of computer bits beside Lawrence (4)
14Direct route to fish held by stem (7)
15A large drink announced for Leigh's party girl (7)
17Author to encourage relatives (7)
19See ridge line above the viewer (7)
20Oven over a stone (4)
22Sire for God according to some (10)
25Stars Ira mourns distractedly (4,5)
26Prone to working when head is absent (5)
27Accounts of Eliot drinking beer (5)
28Fun-pokers climbing its stairs (9)

Down
1In island, president shows flash of wit (5)
2Struggles with Florence beneath point (9)
3Clothing adheres to shifting devices (10)
4Running free, a tapster initially spilling lager (2,5)
5Unresponsive marine mammal has tail chopped off in Middle Eastern lake(4,3)
6Pitch indicator retained by vehicle factory (4)
7Setter's after marsupial with plenty of space (5)
8Seduce learned society member, one sharing mattress (9)
13Alcoholic drink retailer announced store of vintage products (4,6)
14Secondary result of process through composition (9)
16Rip sitars apart in landing zones (9)
18Plants gardener in Estonia has (7)
19Apart from gathering man's piece (7)
21Regularly spins ball of material for ropemaker (5)
23Artist with only half of pictures behaves violently (5)
24Birds partly consumed heading north (4)