Author born essentially healthy (6)
I believe the answer is:
orwell
'author' is the definition.
(I've seen this before)
'born essentially healthy' is the wordplay.
'essentially' indicates the central letters.
'healthy' becomes 'well' ('well' can be similar in meaning to 'healthy').
The middle of 'born' is 'or'.
'or'+'well'='ORWELL'
(Other definitions for orwell that I've seen before include "George --, novelist" , "George --, British author" , "Writer of 1984" , "George . . . . . ., writer concerned with social justice" , "British novelist" .)