Understand way of presenting information is within reach (8)
I believe the answer is:
gettable
'within reach' is the definition.
(thesaurus)
'understand way of presenting information' is the wordplay.
'understand' becomes 'get' (getting is a kind of understanding).
'way of presenting information' becomes 'table'.
'get'+'table'='GETTABLE'
'is' is the link.
(Other definitions for gettable that I've seen before include "in range" , "Can be achieved" , "Not out of reach" .)