Final course of action in the most recent vacation spot (4,6)
I believe the answer is:
last resort
'final course of action in' is the definition.
I can't tell whether this definition defines the answer.
'most recent vacation spot' is the wordplay.
'most recent' becomes 'last' (the last in a list is the most recent).
'vacation spot' becomes 're-sort' (synonyms).
'last'+'resort'='LAST RESORT'
'the' is the link.
Can you help me to learn more?
(Other definitions for last resort that I've seen before include "When all else fails, try this" , "when everything else has failed?" , "Final expedient" .)