Slight adjustment of ties, most obsequious (8)

I believe the answer is:

slimiest

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'most obsequious' is the definition.
Both the answer and definition are superlative adjectives. Perhaps there's a link between them I don't understand?

'slight adjustment of ties' is the wordplay.
'slight' becomes 'slim' (synonyms).
'adjustment of' indicates anagramming the letters (I've seen this in other clues).
'ties' with letters rearranged gives 'iest'.
'slim'+'iest'='SLIMIEST'

Can you help me to learn more?

(Another definition for slimiest that I've seen is " Most slippery".)

I've seen this clue in The Guardian.

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