Representative moved mice behind baby (7)
I believe the answer is:
totemic
'representative' is the definition.
(totemic can mean symbolic)
'moved mice behind baby' is the wordplay.
'moved' indicates an anagram.
'behind' means one lot of letters go next to another.
'baby' becomes 'tot' (I've seen this in another clue).
'mice' with letters rearranged gives 'emic'.
'emic' after 'tot' is 'TOTEMIC'.
(Other definitions for totemic that I've seen before include "(Of an object) having spiritual significance" , "worship?" , "Having significance as an emblem" , "Relating to an important symbol" , "worthy of respect" .)