The others turn left to enter, as a consequence (6)
I believe the answer is:
result
'a consequence' is the definition.
(synonyms)
'the others turn left to enter' is the wordplay.
'the others' becomes 'rest' (I've seen this in other clues).
'turn' becomes 'u' (a 'U-turn' is a kind of turn).
'left' becomes 'L' (common abbreviation).
'to enter' is an insertion indicator.
'u'+'l'='ul'
'rest' placed around 'ul' is 'RESULT'.
'as' acts as a link.
(Other definitions for result that I've seen before include "Ulster (anag) - outcome" , "Consequence in Ulster (6)" , "'Outcome, consequence (6)'" , "Final outcome" , "Verdict" .)