But so ludicrously English it’s stupid (6)
I believe the answer is:
obtuse
'stupid' is the definition.
('obtuse' can be similar in meaning to 'stupid')
'but so ludicrously english' is the wordplay.
I cannot really see how this works, but
an anagram of 'but' is 'btu' which is within the answer.
'english' could be 'e' (abbreviation) and 'e' is found in the answer.
The remaining letters 'os' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'it's' is the link.
Can you help me to learn more?
(Other definitions for obtuse that I've seen before include "Not very perceptive or sensitive" , "Angles could be" , "'Dense, slow (6)'" , "Blunt, not sharp or pointed" , "Lacking in insight" .)