Ill provided with some basic knowledge? (4)
I believe the answer is:
sick
'ill' is the definition.
(I know that ill can be written as sick)
'with some basic knowledge?' is the wordplay.
'with' indicates the answer is hidden within the clue.
'SICK' can be found hidden inside 'some basic knowledge'.
'provided' acts as a link.
(Other definitions for sick that I've seen before include "Poorly" , "Infirm" , "Bad" , "not good" , "Ill; nauseous" .)