Be aware of intelligence (5)
I believe the answer is:
sense
This clue is a double definition.
'be aware of' is the first definition.
(I've seen this before)
'intelligence' is the second definition.
(I've seen this in another clue)
(Other definitions for sense that I've seen before include "experience" , "Eg, taste or touch" , "Become aware of" , "may be common" , "eg Taste, smell" .)