August Strindberg ran drugs, concealing this (5)

I believe the answer is:

grand

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'this' is the definition.
The definition suggests a singular noun which matches the answer.

'august strindberg ran drugs concealing' is the wordplay.
'concealing' indicates a hidden word.
'GRAND' is hidden in the letters of 'august strindberg ran drugs'.

Can you help me to learn more?

(Other definitions for grand that I've seen before include "pair of monkeys?" , "Imposing; PS1,000" , "Stately - splendid" , "Piano; thousand pounds" , "sum of money" .)

I've seen this clue in The Telegraph.

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