Impose or force upon (7)
I believe the answer is:
obtrude
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">impose</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that obtrude is a type of impose)</span><br/ ><br/ >'<span class="explanation-format__original">force upon</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for obtrude that I've seen before include "Impose or force (something) on someone" , "Stick out from redoubt" , "Doubter (anag)" , "Redoubt (anag) - become noticeable in an unwelcome way" , "Push oneself in an unwelcome way" .)