Foreign money required for a sea trip (7)
I believe the answer is:
piastre
'foreign money' is the definition.
'piastre' can be an answer for 'money' (I've seen this before). I am not certain of the 'foreign' bit.
'for a sea trip' is the wordplay.
'sea trip' anagrams to 'PIASTRE'.
Though, I'm not sure how the anagram is indicated.
'required' is the link.
Can you help me to learn more?
(Other definitions for piastre that I've seen before include "Small amount of money" , "Former coin in some Middle Eastern countries" , "bit of money" , "Foreign currency" , "Syrian money" .)