Long for start of trip on small bay (5)
I believe the answer is:
covet
'long for' is the definition.
(I've seen this before)
'start of trip on small bay' is the wordplay.
'start of' says to take the initial letters.
'on' means one lot of letters go next to another.
'small bay' becomes 'cove' (I've seen this before).
The initial letter of 'trip' is 't'.
't' after 'cove' is 'COVET'.
(Other definitions for covet that I've seen before include "Yearn to possess (another's property)" , "Long to have (something belonging to another)" , "'Thou shalt not . . . . . thy neighbour's goods'" , "Crave something belonging to someone else" , "Want something belonging to another" .)