Scrap audio tapes to some extent (4)

I believe the answer is:

iota

'scrap' is the definition.
(thesaurus)

'audio tapes to some extent' is the wordplay.
'to some extent' indicates a hidden word.
'IOTA' is hidden in the letters of 'audio tapes'.

(Other definitions for iota that I've seen before include "Gk. letter; tiny amount" , "Foreign character" , "The Greek i (4)" , "Ninthe letter of the Greek alphabet" , "Jot, particle" .)

I've seen this clue in The Telegraph.

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