Sentimental endearment director expressed after end of play (5)
I believe the answer is:
yucky
'sentimental' is the definition.
(thesaurus)
'endearment director expressed after end of play' is the wordplay.
'endearment' becomes 'ducky' (term of endearment).
'director' becomes 'd'.
'expressed' is a deletion indicator (express can mean to squeeze out).
'after' says to put letters next to each other.
'end of play' becomes 'y' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'ducky' with 'd' taken away is 'ucky'.
'ucky' put after 'y' is 'YUCKY'.
(Other definitions for yucky that I've seen before include "Messy, disgusting" , "Revolting" .)