Set about limiting firm's cause for complaint? (6)
I believe the answer is:
tsetse
'for complaint?' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'set about limiting firm's' is the wordplay.
'about' indicates anagramming the letters.
'limiting' is an insertion indicator.
'firm' becomes 'set' (both can mean fixed).
'set' anagrammed gives 'tse'.
'tse' going around 'set' is 'TSETSE'.
'cause' is the link.
Can you help me to learn more?
(Other definitions for tsetse that I've seen before include "fly across Africa" , "bloodsucker" , "Bloodsucking African fly" , "source of sleeping sickness" , "cause of sleepiness?" .)