Analysts like Dorothy (8)

I believe the answer is:

assayers

I'm a little stuck... Click here to teach me more about this clue!

'analysts' is the definition.
(I've seen this in another clue)

'like dorothy' is the wordplay.
'like' becomes 'as'.
'dorothy' becomes 'sayers' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'as'+'sayers'='ASSAYERS'

Can you help me to learn more?

(Other definitions for assayers that I've seen before include "they test for quality" , "They appraise metals" .)

I've seen this clue in the Sydney Morning Herald.

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