Disassemble huge uncovered shelters near island (5)
I believe the answer is:
unrig
'disassemble' is the definition.
(I've seen this in another clue)
'huge uncovered shelters near island' is the wordplay.
'uncovered' indicates the central letters.
'shelters' is an insertion indicator.
'near' becomes 'nr' (abbreviation used in addresses).
'island' becomes 'i' (geographical abbreviation).
The middle letters of 'huge' are 'ug'.
'nr'+'i'='nri'
'ug' placed around 'nri' is 'UNRIG'.
(Other definitions for unrig that I've seen before include "In rug (anag.)" , "(Of a boat) strip of its mast, stays etc" , "Take tackle out" , "Dismantle" , "Take down sails" .)