Doctor Who following teams — not the main event (8)
I believe the answer is:
sideshow
'the main event' is the definition.
'sideshow' can be an answer for 'event' (sideshow is a kind of event). I'm not certain of the 'the main' bit.
'doctor who following teams' is the wordplay.
'doctor' indicates anagramming the letters.
'following' says to put letters next to each other.
'teams' becomes 'sides' (eg football sides).
'who' with letters rearranged gives 'how'.
'how' put after 'sides' is 'SIDESHOW'.
'not' acts as a link.
Can you help me to learn more?
(Other definitions for sideshow that I've seen before include "Not the main scene of activity" , "Subordinate production to the main event" , "affair at a fair" , "Unimportant" , "Wished so for minor incident or issue - at fair?" .)