A girl, on far side of deck, in a waterproof jacket (6)
I believe the answer is:
anorak
'a waterproof jacket' is the definition.
(I've seen this before)
'a girl on far side of deck' is the wordplay.
'girl' becomes 'nora' (**).
'on' says to put letters next to each other.
'far side of' says to take the final letters.
The last letter of 'deck' is 'k'.
'a'+'nora'+'k'='ANORAK'
'in' is the link.
(Other definitions for anorak that I've seen before include "Socially inept person" , "Jacket; nerd (colloq.)" , "Jacket; inept person" , "Nerdy type" , "Garment; studious person" .)