Current examination involving married male is unethical (7)
I believe the answer is:
immoral
'unethical' is the definition.
('immoral' can be a synonym of 'unethical')
'current examination involving married male' is the wordplay.
'current' becomes 'i' (symbol for electric current).
'examination' becomes 'oral' (oral is a kind of examination**).
'involving' means one lot of letters goes inside another.
'married' becomes 'm'.
'male' becomes 'm' (common abbreviation).
'i'+'oral'='ioral'
'm'+'m'='mm'
'ioral' placed around 'mm' is 'IMMORAL'.
'is' is the link.
(Other definitions for immoral that I've seen before include "Evil" , "Unethical, unprincipled" , "Ignoring right and wrong" , "Licentious - dissolute" , "sick" .)