Foam moving forth (5)

I believe the answer is:

froth

'foam' is the definition.
(I know that foam can be written as froth)

'moving forth' is the wordplay.
'moving' indicates an anagram (letters are moved around).
'forth' anagrammed gives 'FROTH'.

(Other definitions for froth that I've seen before include "Small bubbles on a liquid" , "Spume or foam" , "Lather" , "Effervesce" , "Mass of small bubbles" .)

I've seen this clue in The Times.

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