Boycott gets 50 and left balls in bag (7)
I believe the answer is:
balloon
'bag' is the definition.
(thesaurus)
'boycott gets 50 and left balls' is the wordplay.
'boycott' becomes 'ban' (I've seen this in another clue).
'gets' means one lot of letters goes inside another (gets can mean captures or absorbs).
'50' becomes 'l' (Roman numeral).
'and' is a charade indicator (letters next to each other).
'left balls' becomes 'loo' (I can't justify this - if you can you should believe this answer much more).
'l'+'loo'='lloo'
'ban' enclosing 'lloo' is 'BALLOON'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for balloon that I've seen before include "Inflatable thin rubber ball" , "Inflatable sphere, may contain hot air" , "Inflatable - rapidly expand" , "One blown up for party" , "In which Charlie Brown expressed himself" .)