Maintenance at no cost without worries (8)
I believe the answer is:
carefree
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">without worries</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">maintenance at no cost</span>' is the wordplay.<br/ >'<span class="explanation-format__original">maintenance</span>' becomes '<span class="explanation-format__intermediate">care</span>' <span class="explanation-format__explanation">(synonyms)</span>.<br/ >'<span class="explanation-format__original">at no cost</span>' becomes '<span class="explanation-format__intermediate">free</span>' <span class="explanation-format__explanation">(I've seen this in another clue)</span>.<br/ >'<span class="explanation-format__intermediate">care</span>'+'<span class="explanation-format__intermediate">free</span>'='<span class="explanation-format__answer">CAREFREE</span>'<br/ ></span>
(Other definitions for carefree that I've seen before include "Unconstrained" , "Not worried" , "relaxed" , "Light-hearted, no worries" , "Unconcerned - cheerful" .)