Cassandra's edging away from Balearic island ward? (5)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

MINOR{ca} (Balearic island) [C{assandr}A’s edging away]. A ward is a minor for whom a guardian has been appointed, as in the expression ‘ward of court’. I note the setter has chosen a classical Greek name beginning with C when a Spanish one such as Cristina or Carmen would have been more appropriate.