Sort of data that's relevant (8)
I believe the answer is:
material
This clue might be a double definition.
'sort of data' is the first definition.
'material' can be an answer for 'data' (thesaurus). I'm not sure about the 'sort of' bit.
'relevant' is the second definition.
(similar in meaning)
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for material that I've seen before include "Essential" , "Stuff - relevant" , "it is of some significance" , "Directly relevant to a matter, in a law case perhaps" , "grave" .)