Exaggerate β blow up (7)
I believe the answer is:
inflate
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">exaggerate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">blow up</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for inflate that I've seen before include "aggrandize them" , "Puff up" , "Exaggerate or fill with air" , "Expand unduly" , "Enlarge" .)