Group covering Beatles' centrepiece -- Let it be (4)
I believe the answer is:
stet
'let it be' is the definition.
(I've seen this before)
'group covering beatles'' is the wordplay.
'group' becomes 'set' (set is a kind of group).
'covering' means one lot of letters goes inside another.
'beatles'' becomes 't' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'set' placed around 't' is 'STET'.
'centrepiece' acts as a link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for stet that I've seen before include "Let it stand - printer's mark" , "Let it stand (in proofing)" , "Restorative direction needed" , "It may stand" , "Let it stand (on proofs)" .)