Child upset about wild wanderers (6)
I believe the answer is:
nomads
'wanderers' is the definition.
(I know this)
'child upset about wild' is the wordplay.
'child' becomes 'son' (male child).
'upset' is a reversal indicator.
'about' is an insertion indicator.
'wild' becomes 'mad' (similar in meaning).
'son' in reverse letter order is 'nos'.
'nos' going around 'mad' is 'NOMADS'.
(Other definitions for nomads that I've seen before include "Damson for wandering tribes" , "Wandering people, roaming tribes" , "They travel all year round" , "Gypsies" , "Vagrant peoples" .)