One got upset about hospital being very busy (2,3,2)
I believe the answer is:
on the go
'very busy' is the definition.
(I've seen this before)
'one got upset about hospital' is the wordplay.
'upset' indicates anagramming the letters.
'about' indicates putting letters inside.
'hospital' becomes 'H' (abbreviation for hospital on maps).
'one'+'got'='onegot'
'onegot' is an anagram of 'ontego'.
'ontego' going around 'h' is 'ON THE GO'.
'being' acts as a link.
(Other definitions for on the go that I've seen before include "Active, in constant motion" , "ready to start monopoly?" , "Running around busily" , "Very active (colloq.)" , "Ever busy" .)