Remember getting ring back? (6)
I believe the answer is:
recall
'remember' is the definition.
(to recall something is to remember it)
'getting ring back?' is the wordplay.
'getting' says to put letters next to each other.
'ring' becomes 'call' (synonyms).
'back?' becomes 're' (I can't explain this - if you can you should believe this answer much more).
'call' after 're' is 'RECALL'.
Can you help me to learn more?
(Other definitions for recall that I've seen before include "Summon to return" , "Don''t forget - come again" , "cancel" , "Evoke" , "order to come back" .)