Insomniac crashed outside the capital (5)
I believe the answer is:
accra
'capital' is the definition.
(capital of Ghana)
'insomniac crashed outside' is the wordplay.
'outside' indicates a hidden word (a word is around or outside the answer).
'ACCRA' is hidden in the letters of 'insomniac crashed'.
'the' is the link.
(Other definitions for accra that I've seen before include "West African capital" , "Ghanaian city" , "Largest city of Ghana" , "Capital of Ghana, African fritter" , "Ghanaian capital" .)