The sixth sense with one on time with intelligence (9)
I believe the answer is:
espionage
'intelligence' is the definition.
(I know that espionage is a type of spying)
'the sixth sense with one on time' is the wordplay.
'the sixth sense' becomes 'esp' (I've seen this in another clue).
'with' says to put letters next to each other.
'one' becomes 'i' (Roman numeral).
'time' becomes 'age' (an age is a period of time).
'esp'+'i'+'on'+'age'='ESPIONAGE'
'with' acts as a link.
(Other definitions for espionage that I've seen before include "Practice of spying" , "007's game" , "seeking information" , "agent's job" , "hush-hush work" .)