Swarm member’s place, source of trouble (6)
I believe the answer is:
locust
'swarm member's' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'place source of trouble' is the wordplay.
'place' becomes 'locus' ('place' in Latin).
'source of' suggests taking the first letters (the start - or source - of the word).
The initial letter of 'trouble' is 't'.
'locus'+'t'='LOCUST'
Can you help me to learn more?
(Other definitions for locust that I've seen before include "Vegetation-destroying grasshopper" , "It strips plants" , "Sturdy, resilient" , "Destructive insect; tree" , "Sort of migratory grasshopper" .)