50% of global occupations involving American household fittings (11)
I believe the answer is:
balustrades
'household fittings' is the definition.
'50 of global occupations involving american' is the wordplay.
I cannot really understand how this works, but
'50' could be 'l' (roman numeral) and 'l' is found within the answer.
'occupations' could be 'trades' (trade is a kind of occupation) and 'trades' is present in the answer.
'american' could be 'us' (abbreviation for United States) and 'us' is located in the answer.
The remaining letters 'ba' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for balustrades that I've seen before include "Supports" , "Supported railings" .)