SEALs experience narrow escape from danger (5,5)
I believe the answer is:
close shave
'narrow escape from danger' is the definition.
(I've seen this in another clue)
'seals experience' is the wordplay.
'seals' becomes 'closes' (I've seen this in another clue).
'experience' becomes 'have' (synonyms).
'closes'+'have'='CLOSE SHAVE'
(Other definitions for close shave that I've seen before include "Chases vole (anag.)" , "nasty moment" , "Danger narrowly averted" , "Almost a disaster" , "Near thing" .)