Massage this as vigorously, before beginning to unwind (7)
I believe the answer is:
shiatsu
'massage' is the definition.
(I've seen this before)
'this as vigorously before beginning to unwind' is the wordplay.
'vigorously' indicates an anagram (the letters move vigorously around).
'before' means one lot of letters go next to another.
'beginning to' indicates taking the first letters.
The initial letter of 'unwind' is 'u'.
'this'+'as'='thisas'
'thisas' with letters rearranged gives 'shiats'.
'shiats'+'u'='SHIATSU'
(Other definitions for shiatsu that I've seen before include "Touchy-feely service" , "Form of treatment that entails pressure with the fingers on specific points on the body" , "Japanese therapy that uses acupressure" , "form of massage" , "Japanese healing therapy using massage with the fingers" .)