a prince, one in a guardian's care having Balls, perhaps above all (6)
I believe the answer is:
edward
'a prince' is the definition.
(I've seen this before)
'care having balls perhaps above all' is the wordplay.
'care' becomes 'ward'.
'having balls perhaps' becomes 'ed' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'above all' means one lot of letters go next to another (some letters go above others).
'ward' put after 'ed' is 'EDWARD'.
'one in a guardian's' 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 edward that I've seen before include "Lear, perhaps" , "Lear, Elgar or Fox" , "I (1239-1307), II (1284-1327), III (1312-77), IV (1442-83), V (1470-83?), VI (1537-53), VII (1841-1910) or VIII (1894-1972)" , "First name of Mr Rochester (Jane Eyre)" , "-- Heath, British PM" .)