What does the cryptic crossword clue "Slight adjustment of ties, most obsequious (8)" mean?

The wordplay uses an anagram. anagram of SLIM (synonym="slight") + TIES (synonym="TIES") = SLIMIEST The answer is SLIMIEST.

Slight adjustment of ties, most obsequious (8)

Guardian Cryptic #29616 | 5 Down | 2025-02-12 flower