Industrial experiment? (5)

I believe the answer is:

trial

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

'experiment?' is the definition.
(I know that trial is a type of experiment)

'industrial' is the wordplay.
'TRIAL' is hidden in amongst the letters.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for trial that I've seen before include "Legal hearing" , "Test to determine guilt or innocence" , "Troublesome thing; test" , "Judicial hearing and judgment" , "Court proceeding" .)

I've seen this clue in the Evening Standard.

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