Group following Celia waving ribbon (5,4)
I believe the answer is:
alice band
'ribbon' is the definition.
(type of hairband)
'group following celia waving' is the wordplay.
'group' becomes 'band' (band can mean a group of people).
'following' means one lot of letters go next to another.
'waving' indicates an anagram (letters wave around).
'celia' is an anagram of 'alice'.
'band' after 'alice' is 'ALICE BAND'.
(Other definitions for alice band that I've seen before include "It's worn to hold back the hair" , "Lock keeper" , "Hair decoration" , "fashion accessory" , "one's found in hair" .)