Curious need developed over time (2,3,6)
I believe the answer is:
in due course
'curious need developed over time' is the definition.
I can't tell whether this definition defines the answer.
'curious need developed' is the wordplay.
'developed' indicates anagramming the letters.
'curious'+'need'='curiousneed'
'curiousneed' is an anagram of 'IN DUE COURSE'.
Can you help me to learn more?
(Other definitions for in due course that I've seen before include "in the natural order" , "at the proper time" , "At the appropriate time" , "When the time comes" , "Eventually" .)