Brief immersion that may be lucky? (3)
I believe the answer is:
dip
This clue could be a double definition.
'brief immersion' is the first definition.
'dip' can be an answer for 'immersion' (dip is a kind of immersion). I'm not certain of the 'brief' bit.
'may be lucky?' is the second definition.
(I've seen this before)
'that' is the 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" .)