Smarten up in grand accommodation (5)
I believe the answer is:
groom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">smarten up</span>' is the definition.<br/ ><span class="explanation-format__explanation">(as in grooming oneself)</span><br/ ><br/ >'<span class="explanation-format__original">grand accommodation</span>' is the wordplay.<br/ >'<span class="explanation-format__original">grand</span>' becomes '<span class="explanation-format__intermediate">G</span>' <span class="explanation-format__explanation">(G is short for ground as in a thousand)</span>.<br/ >'<span class="explanation-format__original">accommodation</span>' becomes '<span class="explanation-format__intermediate">room</span>' <span class="explanation-format__explanation">(eg a hotel room)</span>.<br/ >'<span class="explanation-format__intermediate">g</span>'+'<span class="explanation-format__intermediate">room</span>'='<span class="explanation-format__answer">GROOM</span>'<br/ ><br/ >'<span class="explanation-format__original">in</span>' acts as a link.<br/ ></span>
(Other definitions for groom that I've seen before include "Tidy - stableman" , "Curry - husband-to-be" , "Tender of horses" , "Newly-wed; preen" , "royal attendant" .)