Dim kind of family initially delayed (7)
I believe the answer is:
unclear
'dim' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for unclear that I've seen before include "Imprecise, hazy" , "Not definite" , "Doubtful" , "Not easy to see or understand" , "Vague" .)