Needle may give bobble regularly with crushed silk (7)
I believe the answer is:
obelisk
'needle' is the definition.
(I've seen this before)
'bobble regularly with crushed silk' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'with' says to put letters next to each other.
'crushed' indicates anagramming the letters.
The alternating letters of 'bobble' are 'obe'.
'silk' anagrammed gives 'lisk'.
'obe'+'lisk'='OBELISK'
'may give' is the link.
(Other definitions for obelisk that I've seen before include "Stone "needle"" , "Pyramidal monument" , "Ancient Egyptian monument" , "Tapering, rectangular stone column" , "Tapering square stone monument" .)