Nervous type in a hide, perhaps? (8)
I believe the answer is:
twitcher
I believe this clue is a double definition.
'nervous type' is the first definition.
(someone who twitches)
'in a hide perhaps?' is the second definition.
(hide can mean a shelter used by birdwatchers)
(Other definitions for twitcher that I've seen before include "Name for a keen bird-watcher" , "Measure; creep" , "Dedicated birdwatcher" , "Rare bird spotter" , "pursuing hobby?" .)