Others appear in Empire State (4)
I believe the answer is:
'others' is the definition.
(I've seen this before)
'appear in empire state' is the wordplay.
'appear in' indicates a hidden word (I've seen 'appearing in' mean this).
'REST' is hidden within 'empire state'.
(Other definitions for rest that I've seen before include "Support for putting things on" , "Relax with residue" , "Leisure" , "Remainder; relax" , "Relaxation" .)