Police squad coming up with no answer (3)
I believe the answer is:
met
'police' is the definition.
(London Metropolitan Police)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for met that I've seen before include "Encountered, came into contact" , "Encountered by chance or arrangement" , "Encountered pro tem" , "London police (abbr) - New York Museum of Art (abbr)" , "Got together" .)