Current terms of the Grand Unified Theory (4)

I believe the answer is:

eddy

'current' is the definition.
(I know that eddy is a type of current)

'terms of the grand unified theory' is the wordplay.
'terms of' indicates one should take the final letters (term can mean the end of something).
The last letters of 'the grand unified theory' are 'EDDY'.

(Other definitions for eddy that I've seen before include "Fellow" , "moving water" , "Whirling current" , "current revolution" , "Whirl (in fluid)" .)

I've seen this clue in The Guardian.

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