Doctor was there with daughter for turning point (9)
I believe the answer is:
watershed
'turning point' is the definition.
(I've seen this in another clue)
'doctor was there with daughter' is the wordplay.
'doctor' is an anagram indicator.
'with' means one lot of letters go next to another.
'daughter' becomes 'd' (genealogical abbreviation).
'was'+'there'='wasthere'
'wasthere' anagrammed gives 'watershe'.
'watershe'+'d'='WATERSHED'
'for' acts as a link.
(Other definitions for watershed that I've seen before include "Line of high land from which streams flow in opposite directions" , "dividing line" , "Ridge with streams on each side, a turning-point" , "Ridge between river valleys" , "Dividing ridge between two rivers" .)