System for detecting the pulses found in Ferguson, Arkansas (5)
I believe the answer is:
sonar
'system for detecting' is the definition.
'in ferguson arkansas' is the wordplay.
'in' says the answer is hidden in the clue.
'SONAR' is hidden in the letters of 'ferguson arkansas'.
'the pulses found' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for sonar that I've seen before include "Underwater detector" , "What a near-blind creature uses" , "Underwater navigation device" , "System to locate underwater objects" , "Echo-sounding equipment" .)