Cellist Pablo (6)
I believe the answer is:
casals
'cellist pablo' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for casals that I've seen before include "Pablo (or Pau) -, cellist" , "Pablo --, famous cellist" , "Pablo --, Spanish cellist and composer 1876-1973" , "Pablo -, noted Spanish cellist" .)