Weapon not seen at the front? (4,3)
I believe the answer is:
side arm
'weapon' is the definition.
(side arm is a kind of weapon)
'not seen at the front?' is the wordplay.
'not seen' becomes 'arm' (I can't justify this - if you can you should give a lot more credence to this answer).
'at' says to put letters next to each other (I've seen this in other clues).
'the front?' becomes 'side' (front is a kind of side).
'arm' put after 'side' is 'SIDE-ARM'.
Can you help me to learn more?
(Another definition for side arm that I've seen is " weapon".)