Reconvene outside - better go through again (5)
I believe the answer is:
recap
'go through again' is the definition.
(I've seen this before)
'reconvene outside better' is the wordplay.
'outside' means to remove the middle letters.
'better' becomes 'cap' (I've seen this before).
'reconvene' with its middle removed is 're'.
're'+'cap'='RECAP'
(Other definitions for recap that I've seen before include "look back on past things" , "Provide summary" , "Summarising statement" , "Run through again (Inf)" , "Summarise (colloq.)" .)