Thought about total euros needed in Poland on vacation (8)
I believe the answer is:
presumed
'thought' is the definition.
(I've seen this before)
'about total euros needed in poland on vacation' is the wordplay.
'about' becomes 're' (regarding).
'total' becomes 'sum' (synonyms).
'euros' becomes 'e'.
'needed in' means one lot of letters goes inside another.
'on vacation' means to remove the middle letters.
'poland' with its middle removed is 'pd'.
're'+'sum'+'e'='resume'
'resume' put within 'pd' is 'PRESUMED'.
(Other definitions for presumed that I've seen before include "expected" , "Was impertinent" , "Taken for granted" , "Took for granted" , "Supposed" .)