1 First option: takes over leaders with sound of buzzer (2, 2)
3 Second option: on reflection, assembles core from bottom, with no extraneous leaders around (3, 2, 2)
8 Return mail amidst more Spanish villainy (7)
9 Kiss unclothed person cycling in underwear (5)
10 Ring ring-- ding ding ding! (5)
11 Members of panel lie still, clutching stomachs (7)
12 Cured pork allowed in village (6)
14 Loony cheeps in tree (6)
18 Winning is smart again? (7)
20 Summer adventure starts on both sides of long wood (5)
22 Spanish runner has talent with UI switches (5)
23 District attorney, lost among kennel experts, comes back (7)
24 Strange desires anyway... (7)
25 Quietly settle in San Francisco, e.g. (4)