The horrible Mr Krueger's current form? (4)

I believe the answer is:

eddy

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'the horrible mr' is the definition.
'Eddy' can be an answer for 'mr'. I am not certain of the 'the horrible' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for eddy that I've seen before include "Twist" , "Religious woman" , "A small whirl of water" , "Whirl (in fluid)" , "Turner at sea" .)

I've seen this clue in the Evening Standard.

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