In lab, cope with modifying clinical trial 'drug'? (7)

I believe the answer is:

placebo

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'clinical trial 'drug'?' is the definition.
(drug with no effect used in clinical trials)

'in lab cope with modifying' is the wordplay.
'lab cope' can be anagrammed to 'PLACEBO'.
But, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for placebo that I've seen before include "memorial service" , "Pill with no medicinal content" , "innocuous dose" , "Medicine working by psychology only" , "part of experiment" .)

I've seen this clue in The Telegraph.

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