Explosive initials (3)

I believe the answer is:

tnt

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

This is the entire clue.

(Other definitions for tnt that I've seen before include "Initially, powerful explosive" , "Type of high explosive" , "Very powerful explosive, compressed" , "Explosive compound" , "Explosive stuff" .)

I've seen this clue in the USA Today, The Wall Street Journal, the LA Times, The Star Tribune and the Newsday.

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