Joiner keeping job, held down (8)

I believe the answer is:

anchored

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'held down' is the definition.
'anchored' can be an answer for 'held' (thesaurus). I am not sure about the 'down' bit.

'joiner keeping job' is the wordplay.
'joiner' becomes 'and' (I've seen this before).
'keeping' is an insertion indicator.
'job' becomes 'chore' (synonyms).
'and' going around 'chore' is 'ANCHORED'.

Can you help me to learn more?

(Other definitions for anchored that I've seen before include "Fixed in one place" , "Fixed firmly and securely" , "Of ship, moored to the sea-bottom" , "Fixed to the spot, like ship" , "unlikely to drift" .)

I've seen this clue in The Telegraph.

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