Seaman dismissed - or near enough! (5)
I believe the answer is:
about
'near enough' is the definition.
'about' can be an answer for 'near' (I've seen this in another clue). I'm not certain of the 'enough' bit.
'seaman dismissed' is the wordplay.
'seaman' becomes 'ab' (short for able seaman).
'dismissed' becomes 'out' (dismissed in cricket).
'ab'+'out'='ABOUT'
'or' is the link.
Can you help me to learn more?
(Other definitions for about that I've seen before include "Concerning; approximately" , "Concerning or in neighbourhood" , "In the area of or in relation to" , "Regarding" , "Not exactly - concerning" .)