Church nook (4)
I believe the answer is:
apse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">church nook</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for apse that I've seen before include "Where you could find a magistrate's chair" , "Church recess in lapsed condition" , "Peas (anag) -- part of a church" , "Peas (anag) - found in church" , "Domed section of a church" .)