To be inferred, simplicity has no limits (8)
I believe the answer is:
implicit
'to be inferred' is the definition.
(thesaurus)
'simplicity has no limits' is the wordplay.
'has no limits' says to take the centre.
The centre of 'simplicity' is 'IMPLICIT'.
(Other definitions for implicit that I've seen before include "Not in so many words" , "Indirectly implied" , "Not actually stated" , "Suggested indirectly" , "I clip Tim (anag.)" .)