English male singer that's on special official missions (9)
I believe the answer is:
embassies
'official missions' is the definition.
'embassies' can be an answer for 'missions' (I've seen this before). I am not sure about the 'official' bit.
'english male singer that's on special' is the wordplay.
'english' becomes 'E' (abbreviation).
'male' becomes 'm' (common abbreviation).
'singer' becomes 'bass' (bass is a kind of singer).
'that's' becomes 'ie' (abbreviation for 'id est', 'that is' in Latin).
'on special' becomes 's' (common abbreviation as in Special Air Service. I am not sure about the 'on' bit.).
'e'+'m'+'bass'+'ie'+'s'='EMBASSIES'
Can you help me to learn more?
(Other definitions for embassies that I've seen before include "Missions" , "Diplomatic buildings" , "foreign delegations" , "Official residences of ambassadors" , "More than one mission" .)