longstop

/L AO1 NG S T AA1 P/
noun
  1. 1

    A fielding position, now confined to the amateur game, behind the wicket-keeper (so as to retrieve balls that the wicket-keeper misses); a fielder in this position

Source: https://en.wiktionary.org/wiki/long%20stop, https://en.wiktionary.org/wiki/longstop