A side of tuna in sushi prepared with Japanese pressure treatment (7)
I believe the answer is:
shiatsu
'pressure treatment' is the definition.
(I've seen this in another clue)
'a side of tuna in sushi prepared' is the wordplay.
'side of' says to take the initial letters (the letter from one side of the word).
'in' means one lot of letters goes inside another.
'prepared' indicates an anagram.
The initial letter of 'tuna' is 't'.
'a'+'t'='at'
'sushi' anagrammed gives 'shisu'.
'at' placed into 'shisu' is 'SHIATSU'.
'with japanese' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for shiatsu that I've seen before include "form of massage" , "Japanese treatment that uses acupressure" , "Massage therapy using pressure points" , "Japanese healing therapy using massage with the fingers" , "form of Japanese therapy" .)