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One might be worried to see lost ice go! (9)

Ross

I believe the answer is:

ecologist

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'one might' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'worried to see lost ice go' is the wordplay.
'lost ice go' can be anagrammed to 'ECOLOGIST'.
Though, I am unsure how the anagram is indicated.

'be' acts as a link.

Can you help me to learn more?

(Other definitions for ecologist that I've seen before include "See scientist" , "One concerned with the environment" , "Student of living things and their environment" , "Company's possessions" , "Environmentalist" .)

I've seen this clue in The Sun.
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