Tie up North African (4)

I believe the answer is:

moor

This clue is a double definition.

'tie up' is the first definition.
(I've seen this before)

'north african' is the second definition.

(Other definitions for moor that I've seen before include "See 5 Down" , "Upland tract - secure boat" , "Tether (a boat)" , "Ilkley or Bodmin" , "Secure ship with cables" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app