Dada, perhaps, returning after getting old, for some more (5)
I believe the answer is:
extra
'some more' is the definition.
(I've seen this before)
'dada perhaps returning after getting old' is the wordplay.
'dada perhaps' becomes 'art' (I am not sure about this - if you are sure you should believe this answer much more).
'returning' is a reversal indicator.
'after getting' means one lot of letters go next to another.
'old' becomes 'ex' (prefix meaning former or onetime).
'art' written backwards gives 'tra'.
'tra' after 'ex' is 'EXTRA'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for extra that I've seen before include "Bit part actor" , "Run scored but not off the bat" , "One playing small part" , "No great contribution to film" , "Additional - run - actor - newspaper edition" .)