Solely (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">solely</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for only that I've seen before include "Merely; single" , "Solely, lone" , "And nothing more; sole" , "Simply" , ". . . . the Lonely (sung by Roy Orbison)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">solely</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for merely that I've seen before include "'Only, and nothing more (6)'" , "Just one" , "Simply - only" .)