Bar pleased he is out from Dacca (11)
I believe the answer is:
bangladeshi
'bar pleased he is out from dacca' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'bar pleased he is' is the wordplay.
'bar' becomes 'ban' (I've seen this in another clue).
'pleased' becomes 'glad' (similar in meaning).
'he is' becomes 'eshi' (I can't explain this - if you can you should believe this answer much more).
'ban'+'glad'+'eshi'='BANGLADESHI'
Can you help me to learn more?
(Other definitions for bangladeshi that I've seen before include "from South Asian republic" , "From Dhaka, perhaps" , "Foreigner" , "Native of Dhaka" .)