Child's allowance (6,5)
I believe the answer is:
pocket money
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">child's allowance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pocket money that I've seen before include "Cash spent on sweets and crisps?" , "Child's allowance" .)