Bright star in spiral ring complex (7)
I believe the answer is:
polaris
'bright star' is the definition.
(I've seen this in another clue)
'spiral ring complex' is the wordplay.
'ring' becomes 'O' (letter resembling a ring).
'complex' is an anagram indicator.
'spiral'+'o'='spiralo'
'spiralo' with letters rearranged gives 'POLARIS'.
'in' acts as a link.
(Other definitions for polaris that I've seen before include "star (non-movie)" , "weapon sailors unleash" , "Star useful for navigation" , "Star near the N pole of the heavens" , "North Star - missile" .)