Speak harshly, administering raps (4)

I believe the answer is:

rasp

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'speak harshly' is the definition.
(I've seen this in another clue)

'administering raps' is the wordplay.
'raps' can be anagrammed to 'RASP'.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for rasp that I've seen before include "Harsh noise - file" , "Harsh grating sound" , "Filing tool" , "It is used to grate" , "Grating noise; file" .)

I've seen this clue in the Evening Standard.

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