A couple of sheep a ram agitated (5)

I believe the answer is:

hetup

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'a ram agitated' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'a couple of sheep' is the wordplay.
'a couple of' becomes 'he' (I can't justify this - if you can you should give a lot more credence to this answer).
'sheep' becomes 'tup' (tup is a kind of sheep).
'he'+'tup'='HETUP'

Can you help me to learn more?

(Another definition for hetup that I've seen is " Angry".)

I've seen this clue in The Daily Express.

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