Spain behind when playing: winger’s back to stop short corners (7,5)

'short corners' is the definition.
(sharp road bends)

'spain behind when playing winger's back to stop' is the wordplay.
'when playing' indicates an anagram.
'back' says to take the final letters (the letter at the back).
'to stop' indicates putting letters inside (inserted letters plug or stop a gap).
The final letter of 'winger' is 'r'.
'spain'+'behind'='spainbehind'
'spainbehind' with letters rearranged gives 'haipinbends'.
'haipinbends' enclosing 'r' is 'HAIRPIN BENDS'.