Presumably, if theres a security risk, they wont strike (6-7)
I believe the answer is:
safety-matches
'presumably if theres a' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'security risk they wont strike' is the wordplay.
I cannot quite see how this works, but
'security' could be 'safety' (being secure is being safe) and 'safety' is found in the answer.
The remaining letters 'matches' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for safety-matches that I've seen is " For lighting things (but not Swan Vestas".)