A French press chief accepts reverse, lacking support (8)

I believe the answer is:

unbacked

'lacking support' is the definition.
(not backed or supported)

'a french press chief accepts reverse' is the wordplay.
'a french' becomes 'un' ('a' in French).
'press chief' becomes 'ed' (editor).
'accepts' is an insertion indicator.
'reverse' becomes 'back' (I've seen this before).
'un'+'ed'='uned'
'uned' placed around 'back' is 'UNBACKED'.

I've seen this clue in The Times.

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