Doubt a meadow contains cow (4)

I believe the answer is:

tame

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'cow' is the definition.
Although both the answer and definition are verbs in their base form, I don't understand how one could define the other.

'doubt a meadow contains' is the wordplay.
'contains' indicates a hidden word.
'TAME' is hidden in the letters of 'doubt a meadow'.

Can you help me to learn more?

(Other definitions for tame that I've seen before include "Flat" , "Broken in" , "Not exciting; cooperative" , "'Domesticated, docile (4)'" , "Domesticated, gentle" .)

I've seen this clue in The Telegraph.

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