Scrooge is in sea abroad (5)

I believe the answer is:

miser

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'scrooge' is the definition.
('miser' can be a synonym of 'scrooge')

'is in sea abroad' is the wordplay.
'in' is an insertion indicator.
'sea abroad' becomes 'mer' (I can't justify this - if you can you should believe this answer much more).
'is' placed into 'mer' is 'MISER'.

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(Other definitions for miser that I've seen before include "Tightwad, hoarder" , "Person who hoards money" , "Stingy hoarder" , "He's close" , "Hoarder of money and possessions" .)

I've seen this clue in The Telegraph.

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