Nothing to show here. It's just stupid (8)
I believe the answer is:
clueless
'stupid' is the definition.
(I've seen this before)
'nothing to show here it's' is the wordplay.
I cannot quite see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is located in the answer.
This explanation may well be incorrect...
'just' is the link.
Can you help me to learn more?
(Other definitions for clueless that I've seen before include "Knowing nothing" , "Stupid - ignorant" , "Without any understanding" , "Completely at sea about what's going on" , "Stupid (unlike crosswords!)" .)