Tiny bit in audiotape (4)

I believe the answer is:

iota

'tiny bit' is the definition.
(an iota is a tiny piece)

'in audiotape' is the wordplay.
'in' indicates a hidden word.
'IOTA' is hidden in the letters of 'audiotape'.

(Other definitions for iota that I've seen before include "little part" , "A little piece" , "Hint" , "Contrivance" , "Jot or tittle" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app