Active sort of hen to move (2,3,2)
I believe the answer is:
on the go
'active' is the definition.
(I've seen this before)
'sort of hen to move' is the wordplay.
'sort of' indicates an anagram.
'move' becomes 'go' (to go is to move).
'hen'+'to'='hento'
'hento' is an anagram of 'onthe'.
'onthe'+'go'='ON THE GO'
(Other definitions for on the go that I've seen before include "Very active (colloq.)" , "Active and energetic" , "Active, in constant motion" , "Always busy" , "Busy and active" .)