Brigid occasionally shelters family from this devastated island (6)
I believe the answer is:
bikini
'this devastated island' is the definition.
'bikini' can be an answer for 'island' (I've seen this before). I'm not sure about the 'this devastated' bit.
'brigid occasionally shelters family' is the wordplay.
'occasionally' means one should take alternating letters (letters taken at regular intervals or occasions).
'shelters' indicates putting letters inside.
'family' becomes 'kin' (synonyms).
The alternate letters of 'brigid' are 'bii'.
'bii' enclosing 'kin' is 'BIKINI'.
'from' is the link.
Can you help me to learn more?
(Other definitions for bikini that I've seen before include "Infamous atoll" , "Skimpy two-piece swim wear" , "Small bathing costume or atoll in Marshall Islands" , "sparse cover?" , "tests were carried out here" .)