Teaser from setter: Arab produced an unruly child? (4)
I believe the answer is:
brat
'an unruly child?' is the definition.
'brat' can be an answer for 'child?' (brat is a kind of child). I'm not certain of the 'an unruly' bit.
'teaser from setter arab produced' is the wordplay.
'from' indicates named letters should be taken away.
'produced' indicates anagramming the letters.
'setter'+'arab'='setterarab'
'setterarab' with 'teaser' taken away is 'trab'.
'trab' anagrammed gives 'BRAT'.
Can you help me to learn more?
(Other definitions for brat that I've seen before include "Unpleasant youngster" , "Marie ---, birth-control pioneer" , "Horrible child" , "A spoiled badly-behaved child" , "Ill-mannered child" .)