Scot’s scam squeezing Welshman and male compatriot, say (10)
I believe the answer is:
caledonian
'male compatriot say' is the definition.
The definition suggests a singular noun which matches the answer.
'scot's scam squeezing welshman and' is the wordplay.
I cannot really see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is found in the answer.
'scot' could be 'ian' and 'ian' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for caledonian that I've seen is " Scots".)