The bosun is out to make more money (5)
I believe the answer is:
bonus
'more money' is the definition.
'bonus' can be an answer for 'money' (I have seen 'extra money' mean 'bonus' so perhaps 'money' could also mean 'bonus'). I'm not certain of the 'more' bit.
'the bosun is out' is the wordplay.
'is out' is an anagram indicator (I've seen 'was out' mean this).
'bosun' is an anagram of 'BONUS'.
'to make' acts as a link.
Can you help me to learn more?
(Other definitions for bonus that I've seen before include "Extra payment for good work" , "Additional payment or benefit above the norm" , "Extra money paid for good performance" , "commission" , "- generis means unique" .)