What does the cryptic crossword clue "Here, divided constituents of anagram up with tiles (8,4)" mean?

The wordplay uses an anagram. anagram of ANAGRAM + TILES = MARGINALSEAT The answer is MARGINALSEAT.

Here, divided constituents of anagram up with tiles (8,4)

Independent Cryptic #12042 | 12 Down | 2025-05-14 flower