Clint and Emmanuel hiding together (2,6)
I believe the answer is:
in tandem
'together' is the definition.
(I've seen this before)
'clint and emmanuel hiding' is the wordplay.
'hiding' indicates a hidden word.
'IN TANDEM' is hidden in the letters of 'clint and emmanuel'.
(Other definitions for in tandem that I've seen before include "Together (as a pair)" , "'One behind the other, as on a bicycle (2,6)'" , "Together - as on a bicycle made for two" , "Working together" , "Manned it as twosome" .)