Son to pay for work space for loads (7)

I believe the answer is:

stowage

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'work space for loads' is the definition.
I can't judge whether this definition defines the answer.

'son to pay' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'pay' becomes 'wage' (synonyms).
's'+'to'+'wage'='STOWAGE'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for stowage that I've seen before include "Storing space" , "Cargo area on board" .)

I've seen this clue in The Times.

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