Place and time for migratory insect (6)
I believe the answer is:
locust
'migratory insect' is the definition.
'place and time' is the wordplay.
'place' becomes 'locus' (I've seen this before).
'and' means one lot of letters go next to another.
'time' becomes 't'.
'locus'+'t'='LOCUST'
'for' is the link.
(Other definitions for locust that I've seen before include "Voracious grasshopper that travels in swarms" , "Destructive tropical grasshopper" , "Destructive creature" , "Migratory crop stripper" , "It strips plants" .)