Caught by fool in old WW2 battle site (7)

I believe the answer is:

cassino

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'ww2 battle site' is the definition.
I can't tell whether this defines the answer.

'caught by fool in old' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'by' says to put letters next to each other.
'fool' becomes 'ass' (both can mean a stupid person).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'c'+'ass'+'in'+'o'='CASSINO'

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(Other definitions for cassino that I've seen before include "Scene of 1944 fighting" , "card game" , "Italian town" , "Game using cards" .)

I've seen this clue in The Sun.

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