TV programme, the fastest on the box? (3,4)
I believe the answer is:
top gear
'tv programme' is the definition.
(British TV programme)
'fastest on the box?' is the wordplay.
I cannot quite understand how this works, but
'on' could be 'to' and 'to' is found within the answer.
This explanation may well be incorrect...
'the' acts as a link.
Can you help me to learn more?
(Other definitions for top gear that I've seen before include "motorists get into eventually?" , "show on TV?" , "one may drive in it" , "For motorist, it could be fifth" , "set of best clothes?" .)