Deeper (5)
I believe the answer is:
lower
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deeper</span>' is the definition.<br/ ><span class="explanation-format__explanation">('low' can be similar in meaning to 'deep')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lower that I've seen before include "Depress" , "Let or haul down" , "Hereford, say" , "Let down; frown" , "where are trousers in relation?" .)