Sprite and the Spanish sausage — flipping impossible to beat! (11)
I believe the answer is:
impregnable
'impossible to beat' is the definition.
I can't judge whether this definition defines the answer.
'sprite and the spanish sausage flipping' is the wordplay.
'sprite' becomes 'imp' (imp is a kind of sprite).
'and' is a charade indicator (letters next to each other).
'the spanish' becomes 'el' ('the' in Spanish).
'sausage' becomes 'banger' (banger is a kind of sausage).
'flipping' shows that the letters should be reversed in order.
'el'+'banger'='elbanger'
'elbanger' reversed gives 'regnable'.
'imp'+'regnable'='IMPREGNABLE'
Can you help me to learn more?
(Other definitions for impregnable that I've seen before include "Unassailable" , "Not able to be overcome" , "Unable to be overcome" , "Unable to be broken into" , "Unable to be captured" .)