It's a bit matey to raise one's hat (3)
I believe the answer is:
tam
'hat' is the definition.
(thesaurus)
'it's a bit matey to raise one's' is the wordplay.
'it's a bit' indicates taking the first letters (I've seen 'a bit of' mean this).
'to' says to put letters next to each other (I've seen this in other clues).
'raise' shows that the letters should be reversed in order.
'one's' becomes 'at' (I can't explain this - if you can you should give a lot more credence to this answer).
The initial letter of 'matey' is 'm'.
'at' written backwards gives 'ta'.
'm' after 'ta' is 'TAM'.
Can you help me to learn more?
(Other definitions for tam that I've seen before include "'Scottish cloth cap, in short (3)'" , "Headgear" , "Turn over the mat for a cap" , "...-o'-shanter, Scottish cap" , "Scotsman's cap" .)