Means to cover buttonhole? (6)

I believe the answer is:

waylay

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'buttonhole?' is the definition.
(I've seen this before)

'means to cover' is the wordplay.
'means' becomes 'way' (a way or means of doing something).
'to cover' becomes 'lay' (I am not sure about this - if you are sure you should believe this answer much more).
'way'+'lay'='WAYLAY'

Can you help me to learn more?

(Other definitions for waylay that I've seen before include "Accost" , "Lie in wait for, to talk or rob (6)" , "buttonhole" , "Stop or interrupt (someone)" , "Ambush - detain in talk" .)

I've seen this clue in The Independent.

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