Top service provider (4)
I believe the answer is:
acer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">top service provider</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for acer that I've seen before include "Care about the maple?" , "Tree or shrub of the maple genus" , "Tree of maple family" , "ornamental tree" , "Tree with winged fruit" .)