Add to time given to flexible workforce (10)
I believe the answer is:
supplement
'add to' is the definition.
(thesaurus)
'time given to flexible workforce' is the wordplay.
'time' becomes 't'.
'given to' is a charade indicator (letters next to each other).
'flexible' becomes 'supple' ('supple' can be similar in meaning to 'flexible'**).
'workforce' becomes 'men'.
'supple'+'men'='supplemen'
't' put after 'supplemen' is 'SUPPLEMENT'.
(Other definitions for supplement that I've seen before include "Add-on" , "Add to (something)" , "addition" , "Add to; newspaper section" , "something to remedy a deficiency" .)