Take care of appearance away from home (4,3)
I believe the answer is:
look out
'take care' is the definition.
(I've seen this before)
'appearance away from home' is the wordplay.
'appearance' becomes 'look' (look is a kind of appearance).
'away from home' becomes 'out' (synonyms).
'look'+'out'='LOOK-OUT'
'of' acts as a link.
(Other definitions for look out that I've seen before include "Be on your guard!" , "A view of the future" , "as Wenceslas did" , "Take care" , "Be watchful" .)