Church head getting in the way of a plot (5)
I believe the answer is:
patch
'plot' is the definition.
(I know that plot can be written as patch)
'church head getting in the way' is the wordplay.
'head' indicates taking the first letters.
'getting in' is an insertion indicator.
'the way' becomes 'path' ('path' can be a synonym of 'way').
The first letter of 'church' is 'c'.
'c' put into 'path' is 'PATCH'.
'of a' acts as a link.
(Other definitions for patch that I've seen before include "Mend by adding fabric" , "Piece of cloth put on another" , "Piece of material used to cover hole in clothes" , "Material to cover repair" , "Mend with piece of material" .)