Crossword Genius

Current content of mere banner (8)

Ross

I believe the answer is:

streamer

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'banner' is the definition.
(both can mean a flag)

'current content of mere' is the wordplay.
'current' becomes 'stream' (synonyms).
'content of mere' becomes 'er' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'stream'+'er'='STREAMER'

Can you help me to learn more?

(Other definitions for streamer that I've seen before include "Long flag, often tapering" , "Arrest me carrying floating ribbon" , "Ribbon - bad cold?" , "awful cold?" , "that hangs about now?" .)

I've seen this clue in The Telegraph.
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