First person that docked starts to comb an island (6)
I believe the answer is:
ithaca
'island' is the definition.
(I've seen this before)
'first person that docked starts to comb an' is the wordplay.
'first person' becomes 'I' (first-person pronoun).
'docked' means to remove the last letter (to dock can mean to remove the tail of an animal).
'starts to' indicates taking the first letters.
The initial letters of 'comb an' is 'ca'.
'that' with its last letter removed is 'tha'.
'i'+'tha'+'ca'='ITHACA'
(Other definitions for ithaca that I've seen before include "Birthplace of Odysseus" , "part of NY" , "Greek island sought by Ulysses" , "Where Ulysses was produced" , "Legendary island sought by 19across" .)