Calm prince and queen command stage (6)
I believe the answer is:
phlegm
'calm' is the definition.
(I've seen this before)
'prince and queen command stage' is the wordplay.
I cannot really understand how this works, but
'prince' could be 'p' (abbreviation) and 'p' is present in the answer.
'stage' could be 'leg' (synonyms) and 'leg' is found within the answer.
'queen' could be 'hm' (short for Her Majesty) and 'hm' is present in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for phlegm that I've seen before include "Impassivity" , "Mucus - stolidity" , "indifference" , "Mucous secretion" , "Calm temperament" .)