This gives no impression of character! (5,3)
I believe the answer is:
space bar
'this gives no impression' is the definition.
The definition suggests a singular noun which matches the answer.
'character' is the wordplay.
I cannot quite understand how this works, but
'character' could be 'space' (space is a kind of character) and 'space' is found within the answer.
The remaining letters 'bar' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for space bar that I've seen before include "It's on the bottom row of a keyboard" , "Keyboard key" , "It is found on a keyboard" , "used by typists?" , "Longest typing key" .)