Not on the compilers wavelength today 6dn Volcanic central part of Canary islands (4) A?A? 3dn Extremely devious lover hasn't finished engaging in search for fetish (9) O???????? last letter is T if 19ac is PORTIA 19ac Venetian heiress with 12 and a bit acres hiding gold, getting tense (6)?O???A PORTIA why? the OR presumably is the gold. 11ac A measure of loss in firkin, maybe, about quart River Bar consumed (9) ?????E?E?