Defeat left somewhat large shock at first (4)

I believe the answer is:

loss

I'm a little stuck... Click here to teach me more about this clue!

'defeat' is the definition.
(I've seen this in another clue)

'left somewhat large shock at first' is the wordplay.
'left somewhat' becomes 'l' (common abbreviation. I am not sure about the 'somewhat' bit.).
'large' becomes 'os' (abbreviation for oversize).
'at first' suggests taking the first letters.
The initial letter of 'shock' is 's'.
'l'+'os'+'s'='LOSS'

Can you help me to learn more?

(Other definitions for loss that I've seen before include "Disadvantage" , "Deficit" , "Forfeiture" , "Financial reverse" , "Failure to profit or succeed" .)

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

Want a hint initially instead of a full solution? Install my app