Cover married worker on Irish ship (6)
I believe the answer is:
mantle
'cover' is the definition.
(mantle can mean to cover or cloak)
'married worker on irish ship' is the wordplay.
'married' becomes 'm' (abbreviation, e.g. in genealogy).
'worker' becomes 'ant' (worker is a type of ant).
'on irish ship' becomes 'le' (I can't justify this - if you can you should give a lot more credence to this answer).
'm'+'ant'+'le'='MANTLE'
Can you help me to learn more?
(Other definitions for mantle that I've seen before include "Cloak or loose outer garment" , "Cloak and shelf over the fireplace" , "A cloak, cover" , "Loose cloak, shawl" , "Gas lamp part; cloak" .)