Legal age to host party? (4)
I believe the answer is:
gala
'party?' is the definition.
(thesaurus)
'legal age to host' is the wordplay.
'to host' says the answer is hidden in the clue (I've seen 'hosts' mean this).
'GALA' can be found hidden inside 'legal age'.
(Other definitions for gala that I've seen before include "Festival" , "sporting event" , "Fête" , "Public festivity" , "Festivity - celebration" .)