Familiar viewing (5)

I believe the answer is:

telly

I'm a little stuck... Click here to teach me more about this clue!

'familiar viewing' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

This is all the clue.

Can you help me to learn more?

(Other definitions for telly that I've seen before include "cop in seventies" , "Familiar name for TV" , "TV (colloq.)" , "'The box' (colloquial)" , "The goggle-box" .)

I've seen this clue in the Evening Standard.

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