Crossword Genius

I caught detached iceberg turning back diver (5)

Ross

I believe the answer is:

grebe

I'm a little stuck... Click here to teach me more about this clue!

'diver' is the definition.
(diving bird)

'i caught detached iceberg turning back' is the wordplay.
'GREBE' is hidden backwards in amongst the letters.
But, I'm uncertain how this is indicated.

Can you help me to learn more?

(Other definitions for grebe that I've seen before include "Aquatic bird that builds floating nests" , "Diving waterbird" , "Freshwater diving bird" , "Small diving waterfowl with a long neck" , "Crested water-bird" .)

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