Pairs regularly wearing pink beads (6)
I believe the answer is:
rosary
'beads' is the definition.
(rosary is a kind of beads)
'pairs regularly wearing pink' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'wearing' indicates putting letters inside.
'pink' becomes 'rosy' (I've seen this before).
The alternating letters of 'pairs' are 'ar'.
'ar' placed inside 'rosy' is 'ROSARY'.
(Other definitions for rosary that I've seen before include "String of prayer beads" , "believer can count on it" , "Catholic's string of beads" , "String of beads used in devotions" , "String of devotional beads" .)