Top celebrity left one in tears when working (1,6)
I believe the answer is:
Here is my best explanation:
'top celebrity' is the definition.
(I've seen this before)
'left one in tears when working' is the wordplay.
'left one' becomes 'li' (left abbreviation plus 1).
'in' indicates putting letters inside.
'when working' is an anagram indicator (I've seen this in other clues).
'tears' anagrammed gives 'aster'.
'li' inserted within 'aster' is 'A-LISTER'.
(Other definitions for a-lister that I've seen before include "Top celebrity", "Worthy", "Top star" and "Celebrity".)