Worker in community armed DS Arnott regularly (3,3)

I believe the answer is:

red ant

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'worker in community' is the definition.
'red ant' can be an answer for 'worker' (thesaurus). I'm not sure about the 'in community' bit.

'armed ds arnott regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'armed'+'ds'+'arnott'='armeddsarnott'
The alternating letters of 'armeddsarnott' are 'RED ANT'.

Can you help me to learn more?

(Another definition for red ant that I've seen is " Insect; ardent (anag.)".)

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