Composed about fifty minuets initially (4)
I believe the answer is:
calm
'composed' is the definition.
(I've seen this before)
'about fifty minuets initially' is the wordplay.
'about' becomes 'ca' (abbreviation for 'circa').
'fifty' becomes 'l' (roman numeral).
'initially' indicates taking the first letters.
The initial letter of 'minuets' is 'm'.
'ca'+'l'+'m'='CALM'
(Other definitions for calm that I've seen before include "Placid and unruffled" , "Still and quiet" , "Peaceful, tranquil" , "Placid, unexcited" , "Still - force 0 on the Beaufort scale" .)