I must leave Riviera resort after tea break (6)
I believe the answer is:
chance
'break' is the definition.
(thesaurus)
'i must leave riviera resort after tea' is the wordplay.
'must leave' suggests deleting specific letters.
'riviera resort' becomes 'nice' (I've seen this in another clue).
'after' is a charade indicator (letters next to each other).
'tea' becomes 'cha' (cha is a type of tea).
'nice' with 'i' taken out is 'nce'.
'nce' put after 'cha' is 'CHANCE'.
(Other definitions for chance that I've seen before include "Lady luck" , "'Fate, luck, fortune (6)'" , "Accidental; opportunity" , "he unpredictable element of life" , "The way things happen, luck" .)