Force enemy to land (5)
I believe the answer is:
yemen
'to land' is the definition.
(Yemen is an example)
'force enemy' is the wordplay.
'force' indicates anagramming the letters (letters must be forced into a new order).
'enemy' anagrammed gives 'YEMEN'.
(Other definitions for yemen that I've seen before include "Country bordering Oman" , "Republic by the Red Sea" , "Saudi neighbour" , "Republic sited on the SW corner of Arabia" , "Enemy (anag) - country of Arabia" .)