Premium (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">premium</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bonus that I've seen before include "Additional wage" , "Additional payment to encourage productivity" , "Extra money paid on top of salary" , "Extra pay, perhaps at Christmas?" , "Extra income" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">premium</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for reward that I've seen before include "Prize payment" , "Desert" , "Gift in recognition of achievement" , "It's given to reinforce good behaviour" , "Recompense, remunerate" .)
(Other definitions for top shelf that I've seen before include "adult" , "Where blue material may be found" .)