Fail to catch (4)
I believe the answer is:
miss
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fail to catch</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 miss that I've seen before include "Girl or unmarried woman" , "Single girl" , "Yearn for" , "Strike noisily; criticise" , "Fail to meet - girl" .)