Pop star's dicky heart finally giving way (5)
I believe the answer is:
bowie
'finally giving way' is the definition.
The definition suggests a singular noun which matches the answer.
'pop star's dicky heart' is the wordplay.
'pop star' becomes 'bow' (I am not sure about this - if you are sure you should believe this answer much more).
'dicky' becomes 'dickie-seat' (synonyms).
'heart' says to take the centre.
The middle letters of 'dickieseat' are 'ie'.
'bow'+'ie'='BOWIE'
Can you help me to learn more?
(Other definitions for bowie that I've seen before include "American frontiersman, killed at the Alamo, 1836" , "David --, singer" , "David --, rock singer/songwriter" , "Art rocker David" , "Rock-based chameleon" .)