Wild coast hiding first sign of danger for boat crews? (6)
I believe the answer is:
octads
'boat crews?' is the definition.
(an octad is a group of eight, eg a rowing crew)
'wild coast hiding first sign of danger' is the wordplay.
'wild' indicates anagramming the letters.
'hiding' is an insertion indicator.
'first sign of' says to take the initial letters (I've seen 'first signs' mean this).
The first letter of 'danger' is 'd'.
'coast' is an anagram of 'octas'.
'octas' going around 'd' is 'OCTADS'.
'for' acts as a link.
(Another definition for octads that I've seen is " Groups of eight".)