Reject current issue capturing heart of nation (8)
I believe the answer is:
jettison
'reject' is the definition.
(I've seen this before)
'current issue capturing heart of nation' is the wordplay.
'current' becomes 'jet' (current of water).
'issue' becomes 'son' (issue can mean someone's offspring).
'capturing' means one lot of letters goes inside another.
'heart of' means to look at the middle letters.
The centre of 'nation' is 'ti'.
'jet'+'son'='jetson'
'jetson' going around 'ti' is 'JETTISON'.
(Other definitions for jettison that I've seen before include "bin" , "Abandon or throw overboard" , "'Throw away, cast overboard (8)'" , "Throw things overboard to lighten ship" , "21 [OFFLOAD]" .)