Simple computer language (5)
I believe the answer is:
basic
I believe this is a double definition.
'simple' is the first definition.
(I know that simple can be written as basic)
'computer language' is the second definition.
(I've seen this in another clue)
(Other definitions for basic that I've seen before include "Plain" , "Staple; ordinary" , "Fundamental, forming a starting point" , "Fundamental, forming a starting-point" , "At the lowest level" .)