Latent heat remaining should conceal drama (7)
I believe the answer is:
theatre
'drama' is the definition.
(thesaurus)
'latent heat remaining should conceal' is the wordplay.
'conceal' says the answer is hidden in the clue.
'THEATRE' can be found hidden inside 'latent heat remaining should'.
(Other definitions for theatre that I've seen before include "Hospital operating room - playhouse" , "Space for 11 across art" , "Drama venue" , "eg The Globe" , "Scene of operations or dramatic performances" .)