Analyze grammatically (5)
I believe the answer is:
parse
'analyze grammatically' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for parse that I've seen before include "Spear (anag.); analyse" , "Work out clue" , "Reaps (anag.)" , "Analyse grammatically" , "Resolve the structure of a sentence" .)