Something written in parenthesis? (6)
I believe the answer is:
thesis
'something written' is the definition.
I can't tell whether this definition defines the answer.
'parenthesis?' is the wordplay.
'THESIS' is hidden in amongst the letters.
But, I'm uncertain how this is indicated.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for thesis that I've seen before include "research paper" , "Essay putting forward a particular view" , "writing following research" , "View advanced for purposes of argument" , "A lengthy essay, perhaps for degree" .)