Memorable piece of fielding at end of play (6)
I believe the answer is:
catchy
'memorable' is the definition.
(something catchy is easy to remember)
'piece of fielding at end of play' is the wordplay.
'piece of fielding' becomes 'y' (I can't justify this - if you can you should believe this answer much more).
'at end of' means one lot of letters go next to another (some letters go at the end of others).
'play' becomes 'catch' (catching is a kind of playing).
'y' put after 'catch' is 'CATCHY'.
Can you help me to learn more?
(Other definitions for catchy that I've seen before include "Easy to remember and sing" , "Readily caught, like a tune" , "Of tune, lilting and easy to remember" , "Of a tune, lively and easy to remember" , "(Of tune) infectious" .)