Sense, pick up (6)
I believe the answer is:
detect
I believe this clue is a double definition.
'sense' is the first definition.
(I've seen this in another clue)
'pick up' is the second definition.
(I've seen this in another clue)
(Other definitions for detect that I've seen before include "Ascertain" , "uncover murder?" , "Discover, identify" , "Discover existence of" , "Notice, sense" .)