Influence of funny comedian over One Direction (9)
I believe the answer is:
dominance
'influence' is the definition.
(thesaurus)
'funny comedian over one direction' is the wordplay.
'funny' is an anagram indicator.
'over' means one lot of letters goes inside another.
'one direction' becomes 'n' (N is an example).
'comedian' anagrammed gives 'dominace'.
'dominace' enclosing 'n' is 'DOMINANCE'.
'of' is the link.
(Other definitions for dominance that I've seen before include "Ascendancy" , "Mastery" , "Influence (over others)" , "top position" , "Control - ascendency" .)