Writer tries introducing current term of interest (8)
I believe the answer is:
essayist
'writer' is the definition.
(I know that essayist is a type of writer)
'tries introducing current term of interest' is the wordplay.
'tries' becomes 'essays' (essay can mean to try or attempt something).
'introducing' is an insertion indicator (some letters introduced or inserted into others).
'current' becomes 'I' (physics symbol).
'term of' says to take the final letters (term can mean the terminus or ending of the word).
The last letter of 'interest' is 't'.
'essays' placed around 'i' is 'essayis'.
'essayis'+'t'='ESSAYIST'
(Other definitions for essayist that I've seen before include "Writer (e.g. Lamb)" , "Lamb, for example" , "Writer of short compositions" , "Writer of shorter pieces" , "Montaigne, say" .)