Out and about with bra off when Christ was born? (6)
I believe the answer is:
abroad
'out and about' is the definition.
(I've seen this before)
'with bra off when christ was born?' is the wordplay.
'with' is a charade indicator (letters next to each other).
'off' is an anagram indicator.
'when christ was born?' becomes 'oad' (0 A.D.).
'bra' is an anagram of 'abr'.
'abr' next to 'oad' is 'ABROAD'.
(Other definitions for abroad that I've seen before include "In foreign land" , "Overseas; (of rumour) widely current" , "At large; widely current" , "Europe, for example" , "Away from home" .)