Prince needing good fortune and courage (5)
I believe the answer is:
Here is my best explanation:
'courage' is the definition.
(pluck is a kind of courage)
'prince needing good fortune' is the subsidiary indication.
'prince' becomes 'p'.
'needing' means one lot of letters go next to another.
'good fortune' becomes 'luck' (I've seen this before).
'and' is the link.
(Other definitions for pluck that I've seen before include "Determined courage", "Courage - play a harp", "Pull feathers off a bird before cooking", "pick", "Courage - defeather", "Gather", "Pull a guitar string - courage", "Nerve", "Intrepidity" and "Remove feathers".)