Bling earl displayed, awkwardly, might seem familiar (4,1,4)
I believe the answer is:
ring a bell
'seem familiar' is the definition.
(I've seen this before)
'bling earl displayed' is the wordplay.
'displayed' is an anagram indicator (letters displayed in another way).
'bling'+'earl'='blingearl'
'blingearl' with letters rearranged gives 'RING A BELL'.
'awkwardly might' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for ring a bell that I've seen before include "may awaken memories" , "as may 1A [SHEEPISH] part of 27 [WETHER-BY]" , "Recall" , "jog memories" , "faintly resonate" .)