Fergie returns to confront start of soccer trouble (6)
I believe the answer is:
harass
'trouble' is the definition.
(I've seen this in another clue)
'fergie returns to confront start of soccer' is the wordplay.
'fergie' becomes 'sarah' (I've seen this in another clue).
'returns' is a reversal indicator.
'to confront' says to put letters next to each other.
'start of' indicates taking the first letters.
The initial letter of 'soccer' is 's'.
'sarah' back-to-front is 'haras'.
'haras'+'s'='HARASS'
(Other definitions for harass that I've seen before include "Constantly intimidate" , "Nag" , "Badger, annoy persistently" , "Constantly torment" , "Vex - pester" .)