Crossword Genius

Best low-strength drug? (5)

Ross

I believe the answer is:

elite

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

'best' is the definition.
(elite can mean the very best of a group)

'low-strength drug?' is the wordplay.
I cannot really understand how this works, but
'drug?' could be 'e' (E is another name for ecstasy) and 'e' is located in the answer.
The remaining letters 'lite' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for elite that I've seen before include "Select body, cream" , "top drawer?" , "Pick of the bunch" , "Exclusive set" , "A privileged or select group" .)

I've seen this clue in The Times.
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