Crossword Genius

Woman doctor has to pull out — might this prevent misrepresentation? (5,4)

Ross

I believe the answer is:

truth drug

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

'out might this prevent misrepresentation?' is the definition.
The definition suggests a singular noun which matches the answer.

'woman doctor has to pull' is the wordplay.
I cannot really see how this works, but
'woman' could be 'ruth' and 'ruth' is present in the answer.
'doctor' could be 'dr' (abbreviation) and 'dr' is located in the answer.
'pull' could be 'tug' (to tug something is to pull it) and 'tug' is found in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for truth drug that I've seen before include "Supposed means of preventing lying" , "that may provide required information" .)

I've seen this clue in The Guardian.
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