Under an obligation (8)
I believe the answer is:
beholden
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">under an obligation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for beholden that I've seen before include "Owing gratitude (to)" , "Bound" , "Obliged" , "Under an obligation" , "Owing thanks, indebted" .)