Sailor needing in Le Havre a reel, say, gets plenty (9)
I believe the answer is:
abundance
'plenty' is the definition.
(I've seen this before)
'sailor needing in le havre a reel say' is the wordplay.
'sailor' becomes 'ab' (abbreviation for able seaman).
'needing' says to put letters next to each other.
'in le havre a' becomes 'un' ('a' in French - Le Havre is a French city).
'reel say' becomes 'dance' (reel is a kind of dance).
'ab'+'un'+'dance'='ABUNDANCE'
'gets' is the link.
(Other definitions for abundance that I've seen before include "Plethora" , "A good deal" , "Ban due can be plenty" , "call at whist" , "bid in solo whist" .)