Israel has another hidden capital (5)
I believe the answer is:
lhasa
'capital' is the definition.
(capital of Tibet)
'israel has another hidden' is the wordplay.
'hidden' indicates the answer is hidden within the clue.
'LHASA' can be found hidden inside 'israel has another'.
(Other definitions for lhasa that I've seen before include "Tibetan holy city" , "Tibetan dog breed" , "Capital of Tibet" , "The Forbidden City in Tibet" , "Asian capital" .)