Go into a feature of dysentery (5)
I believe the answer is:
enter
'go into' is the definition.
(enter can mean to go into a place)
'a feature of dysentery' is the wordplay.
'a feature of' says the answer is hidden in the clue.
'ENTER' is hidden in the letters of 'dysentery'.
(Other definitions for enter that I've seen before include "Register (as a competitor)" , "Register formally as a participant" , "Come in - penetrate - record" , "Make a record of" , "Join (for the first time)" .)