Article in photo stops uncontrolled response (5,8)
I believe the answer is:
panic stations
'uncontrolled response' is the definition.
(term for a state of panic or confusion)
'article in photo stops' is the wordplay.
'article' becomes 'an' (indefinite article).
'in' indicates putting letters inside.
'photo' becomes 'pic' (I've seen this before).
'stops' becomes 'stations' (I've seen this before).
'an' placed inside 'pic' is 'panic'.
'panic'+'stations'='PANIC STATIONS'
(Other definitions for panic stations that I've seen before include "State of alarm (colloq.)" , "(Humorous) alarm call" , "alarming situation" , "state of emergency" , "Where everyone is scared and frenetic" .)