Skilled as Bale on the move (4)
I believe the answer is:
able
'skilled' is the definition.
(I've seen this before)
'bale on the move' is the wordplay.
'on the move' is an anagram indicator.
'bale' is an anagram of 'ABLE'.
'as' is the link.
(Other definitions for able that I've seen before include "With the required capacities" , "Bright" , "Talented" , "Bale out, being competent" , "As capable as a mariner" .)