What may be used to display alarm and conflict (4,3)
I believe the answer is:
bell jar
'what may be used' is the definition.
I can't tell whether this definition defines the answer.
'alarm and conflict' is the wordplay.
'alarm' becomes 'bell' (I am not sure about this - if you are sure you should believe this answer much more).
'and' means one lot of letters go next to another.
'conflict' becomes 'jar' (if something jars, it conflicts or clashes).
'bell'+'jar'='BELL-JAR'
'to display' is the link.
Can you help me to learn more?
(Other definitions for bell jar that I've seen before include "Item of laboratory equipment" , "Glass cover used in laboratory" , "one in lab" , "lab equipment" , "Glass cover to prevent laboratory gases escaping" .)