A dog will stir if you prod it (4)

I believe the answer is:

goad

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

'a dog will stir if you prod' is the wordplay.
'a dog' anagrams to 'GOAD'.
But, I am unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for goad that I've seen before include "that provides motivation" , "Spur, urge on" , "Provoke to action" , "Arouse" , "Spur or stimulate" .)

I've seen this clue in the Evening Standard.

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