Crowd on move in Foyle's War maybe (5)
I believe the answer is:
swarm
'crowd on move' is the definition.
'swarm' can be an answer for 'crowd' (swarm is a kind of crowd). I'm not sure about the 'on move' bit.
'in foyle's war maybe' is the wordplay.
'in' says the answer is hidden in the clue.
'SWARM' is hidden in the letters of 'foyles war maybe'.
Can you help me to learn more?
(Other definitions for swarm that I've seen before include "Crowd of e.g. bees" , "Move in large numbers like locusts" , "Large crowd" , "Throng of insects" , "New colonists" .)