Weep over excess baggage? (7)

I believe the answer is:

blubber

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'weep over excess baggage?' is the definition.
'blubber' can be an answer for 'weep' (blubbering is a kind of weeping). I'm not certain of the 'over excess baggage?' bit.

'weep over excess baggage?' is the wordplay.
'weep' becomes 'blub' (I've seen this before).
'over excess baggage?' becomes 'ber' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'blub'+'ber'='BLUBBER'

Can you help me to learn more?

(Other definitions for blubber that I've seen before include "Cry -- whale fat" , "Sob loudly" , "Your body's fat" , "Whale/seal fat" , "source of oil" .)

I've seen this clue in the Sydney Morning Herald.

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