Child upset about wild wanderers (6)
I believe the answer is:
nomads
'wanderers' is the definition.
(nomad is a kind of wanderer)
'child upset about wild' is the wordplay.
'child upset' becomes 'nos' (I can't explain this - if you can you should believe this answer much more).
'about' means one lot of letters goes inside another.
'wild' becomes 'mad' (similar in meaning).
'nos' going around 'mad' is 'NOMADS'.
Can you help me to learn more?
(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" .)