Hi K - good to see you! and Happy New Year! - it's not very often I beat you to an answer!
A couple of times over the past week or so, this clue has been asked and no-one (as far as I can tell) has come up with a satisfactory explanation. Do you mind having a look at it?...Being very tall, see if television is reboxed and amplified (3,4,4) S?X ?O?T ?I?E (we thought the answer might be "six foot five" but why?)
Julie, hope you don't mind my wittering on on your post:o)
Excellent! Thank you kindly Mampara. I'm embarrassed to admit how long I've faffed about over that clue and I'm not even doing that crossword. What a clever clue. regards judy