Trendy type touring hospital, briefly (2,5)
I believe the answer is:
in short
'briefly' is the definition.
('in short' can be a synonym of 'briefly')
'trendy type touring hospital' is the wordplay.
'trendy' becomes 'in'.
'type' becomes 'sort' (I've seen this before).
'touring' means one lot of letters goes inside another (touring can mean going round).
'hospital' becomes 'h'.
'sort' enclosing 'h' is 'short'.
'in'+'short'='IN SHORT'
(Other definitions for in short that I've seen before include "Concisely" , "To sum up, briefly" , "to be brief" .)