Is it safe to wander about at the carnival? (6)
I believe the answer is:
fiesta
'the carnival?' is the definition.
(carnival is a kind of fiesta)
'is it safe to wander about' is the wordplay.
'to wander about' is an anagram indicator (I've seen 'wandering about' mean this (I've seen this in other clues)).
'it'+'safe'='itsafe'
'itsafe' with letters rearranged gives 'FIESTA'.
'at' is the link.
(Other definitions for fiesta that I've seen before include "Continental knees-up" , "A Spanish public celebration" , "Festival, fete" , "Public celebration in Spain" , "Public whoopee in Spain" .)