Dump commander's jacket in boat (5)
I believe the answer is:
scrub
'dump' is the definition.
The answer and definition can be both to do with contact as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'commander's jacket in boat' is the wordplay.
'jacket' suggests removing the centre (the letters worn by the word as a 'jacket' are use).
'in' indicates putting letters inside.
'boat' becomes 'sub' (I've seen this before).
'commander' with its centre removed is 'cr'.
'cr' going into 'sub' is 'SCRUB'.
Can you help me to learn more?
(Other definitions for scrub that I've seen before include "Stunted growth" , "Scour; cancel" , "Brush, in two senses" , "Curbs (anag.)" , "poor growth" .)