Seaman with forward letting go (7)
I believe the answer is:
abandon
'letting go' is the definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Perhaps you can see a link between them that I don't see?
'seaman with forward' is the wordplay.
'seaman' becomes 'ab' (short for able seaman).
'with' becomes 'and'.
'forward' becomes 'on'.
'ab'+'and'+'on'='ABANDON'
Can you help me to learn more?
(Other definitions for abandon that I've seen before include "a complete lack of restraint" , "Kick" , "Walk out on" , "Desert, forsake" , "Total lack of inhibition (often gay?)" .)