So mica fragmented becomes picture (6)
I believe the answer is:
mosaic
'picture' is the definition.
(I know that mosaic is a type of picture)
'so mica fragmented' is the wordplay.
'fragmented' indicates an anagram.
'so'+'mica'='somica'
'somica' is an anagram of 'MOSAIC'.
'becomes' is the link.
(Other definitions for mosaic that I've seen before include "Picture/pattern in small coloured pieces" , "Decorative work of small hard pieces" , "Design of small coloured squares" , "Law of the Jews from Mt Sinai" , "Picture of small tiles" .)