Seaman teasing nets out (6)
I believe the answer is:
absent
'out' is the definition.
('absent' can be similar in meaning to 'out')
'seaman teasing nets' is the wordplay.
'seaman' becomes 'ab'.
'teasing nets' becomes 'sent' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'ab'+'sent'='ABSENT'
Can you help me to learn more?
(Other definitions for absent that I've seen before include "Not present - vacuous" , "AWOL" , "lack of attention" , "Forgetful, with mind on other things" , "Not attending" .)