Brief immersion that may be lucky? (3)
I believe the answer is:
dip
This clue might be a double definition.
'brief immersion' is the first definition.
'dip' can be an answer for 'immersion' (dip is a kind of immersion). I am not certain of the 'brief' bit.
'may be lucky?' is the second definition.
(I've seen this before)
'that' acts as a link.
Can you help me to learn more?
(Other definitions for dip that I've seen before include "baptism" , "Informally a short bathe" , "Plunge briefly in liquid" , "See 21" , "Pickpocket's" .)