Striking play needing endless credit (8)
I believe the answer is:
dramatic
'striking' is the definition.
('dramatic' can be a synonym of 'striking')
'play needing endless credit' is the wordplay.
'play' becomes 'drama' ('drama' can be a synonym of 'play').
'needing' says to put letters next to each other.
'endless' means to remove the last letter.
'credit' becomes 'tick' (I've seen this before).
'tick' with its last letter removed is 'tic'.
'drama'+'tic'='DRAMATIC'
(Other definitions for dramatic that I've seen before include "relating to plays, etc" , "Relating to theatre and acting" , "might be staggering" , "Sensational, thrilling" , "spectacular" .)