Touch thorax, gathering temperature for allergy treatment (5,4)
I believe the answer is:
patch test
'allergy treatment' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'touch thorax gathering temperature' is the wordplay.
'touch' becomes 'pat' (to pat is to touch or tap).
'thorax' becomes 'chest' (synonyms).
'gathering' indicates putting letters inside (gather can mean to acquire or bring in).
'temperature' becomes 't' (abbreviation).
'chest' placed around 't' is 'chtest'.
'pat'+'chtest'='PATCH TEST'
'for' is the link.
Can you help me to learn more?
(Other definitions for patch test that I've seen before include "Diagnostic procedure" , "medical procedure" .)