Presenter in preview bored by endless choice (10)
I believe the answer is:
telecaster
'presenter' is the definition.
(I know that telecaster is a type of presenter)
'preview bored by endless choice' is the wordplay.
'preview' becomes 'taster' (a taster is a preview or sneak peek).
'bored by' indicates putting letters inside (inserted letters bore into the word).
'endless' means to remove the last letter.
'choice' becomes 'elect' (I've seen this in other clues).
'elect' with its final letter taken away is 'elec'.
'taster' placed around 'elec' is 'TELECASTER'.
'in' is the link.
(Another definition for telecaster that I've seen is " one involved in transmission".)