Waves farewell when this holiday is taken? (5,5)
I believe the answer is:
shore leave
'this holiday is taken?' is the definition.
'shore leave' can be an answer for 'holiday' (thesaurus). I'm not certain of the rest of the definition.
'waves farewell' is the wordplay.
'waves' becomes 'shore' (I can't justify this - if you can you should believe this answer much more).
'farewell' becomes 'leave' (synonyms).
'shore'+'leave'='SHORE-LEAVE'
'when' is the link.
Can you help me to learn more?
(Other definitions for shore leave that I've seen before include "Time off for sailors in port" , "rest of the crew" .)