Hospital 'treater' arranged to collect a medical measurement (5,4)

I believe the answer is:

heart rate

'medical measurement' is the definition.

'hospital treater arranged to collect a' is the wordplay.
'hospital' becomes 'h'.
'arranged' indicates anagramming the letters.
'to collect' is an insertion indicator.
'h'+'treater'='htreater'
'htreater' is an anagram of 'heartrte'.
'heartrte' placed around 'a' is 'HEART RATE'.

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app