Those who seek rare chess moves? (9)

I believe the answer is:

searchers

I'm a little stuck... Click here to teach me more about this clue!

'those who seek' is the definition.
The definition suggests an adverb but the answer is not.

'rare chess moves?' is the wordplay.
'moves?' indicates anagramming the letters (I've seen 'moved' mean this).
'rare'+'chess'='rarechess'
'rarechess' anagrammed gives 'SEARCHERS'.

Can you help me to learn more?

Want a hint initially instead of a full solution? Install my app