Her trench is covered in water (7)
I believe the answer is:
mariana
'her' is the definition.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for mariana that I've seen before include "- in the Moated Grange (Tennyson/Millais)" , "------- Trench, the deepest part of the Earth's oceans" .)
I've seen this clue in The Irish Times.
Want a hint initially instead of a full solution?
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