Special vessel NASA's newly developed in Land of Opportunity (8)
I believe the answer is:
arkansas
'land of opportunity' is the definition.
('Arkansas' can be a synonym of 'land of opportunity')
'special vessel nasa's newly developed in' is the wordplay.
'special' becomes 's' (common abbreviation as in Special Air Service).
'vessel' becomes 'ark' (ark is a kind of vessel**).
'newly developed' indicates an anagram.
'in' indicates putting letters inside.
'nasa' anagrammed gives '[nasa]'.
'ark'+'[nasa]'='ark[nasa]'
's' going into 'arkanas' is 'ARKANSAS'.
(Other definitions for arkansas that I've seen before include "used to be a Land of Opportunity" , "Confederate state in the American Civil War" , "Birth state of Bill Clinton" , "State of S. central US" , "Little Rock's state" .)