Get rid of main problem in the top level (9)
I believe the answer is:
eliminate
'get rid' is the definition.
(I've seen this before)
'main problem in the top level' is the wordplay.
'problem' indicates an anagram.
'in' is an insertion indicator.
'the top level' becomes 'elite'.
'main' anagrammed gives 'mina'.
'mina' going inside 'elite' is 'ELIMINATE'.
'of' is the link.
(Other definitions for eliminate that I've seen before include "Get rid of, or exclude from further stage of game" , "put out" , "Completely remove, get rid of" , "Reject" , "Exclude from further stage of competition" .)