Large expanses of frozen ocean (3,5)

North American reindeer (7)

Flip over (5)

Sundry (cricket) (5)

Result of air or liquid movements doubling back on themselves (6)

Eventually; inevitably (6,2,5)

Andean beast of burden (6)

Sacrificial site (5)

River which forms part of the English/Scottish border (5)

Woodland plant, eg the windflower (7)

Zero degrees latitude – where one is when low (8)

In case (4)

Peter out (8)

Brimless, originally Provençal, cap (5)

Something to worry about (5,3,5)

Ezra ----- (1885-1972), troubled US poet (5)

Equable: name shared by 14 popes (7)

Sweet drink containing carbonated water and flavouring (4)

Erode (6)

Turner, PI (anag) (8)

Mineral bore, for instance? (3,4)

Afrikaner camp defended by a circular formation of wagons (6)

Tree or shrub of the birch family (5)

Word employed in a figurative sense (5)

Bejewel (4)