Irish men sent over irregular glue gun? (5)
I believe the answer is:
rifle
'gun?' is the definition.
(I know that rifle is a type of firearm)
'irish men sent over irregular glue' is the wordplay.
'irish men' becomes 'fir' ('men' in Irish Gaelic).
'sent over' is a reversal indicator.
'irregular glue' becomes 'le' (I can't justify this - if you can you should give a lot more credence to this answer).
'fir' reversed gives 'rif'.
'rif'+'le'='RIFLE'
Can you help me to learn more?
(Other definitions for rifle that I've seen before include "strip bare?" , "loot in sack" , "Rummage" , "Firearm - plunder" , "Root" .)