Concentrated beam on Rachel dancing in vision (11)

I believe the answer is:

searchlight

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

'concentrated beam' is the definition.
'searchlight' can be an answer for 'beam' (I've seen this before). I'm not certain of the 'concentrated' bit.

'rachel dancing in vision' is the wordplay.
'dancing' indicates anagramming the letters.
'in' indicates putting letters inside.
'vision' becomes 'sight' (synonyms).
'rachel' with letters rearranged gives 'earchl'.
'earchl' placed inside 'sight' is 'SEARCHLIGHT'.

'on' is the link.

Can you help me to learn more?

(Other definitions for searchlight that I've seen before include "Powerful lamp" , "that must be brilliant" , "It pointedly illuminates" , "Investigatory beam" , "Powerful illuminating beam" .)

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

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