Support NY baseball team in comeback (4)
I believe the answer is:
stem
'support ny' is the definition.
'stem' can be an answer for 'support' (I've seen this before). I'm not certain of the 'ny' bit.
'baseball team in comeback' is the wordplay.
'baseball team' becomes 'mets' (New York Mets).
'in comeback' is a reversal indicator.
'mets' backwards is 'STEM'.
Can you help me to learn more?
(Other definitions for stem that I've seen before include "Axis" , "branch of family" , "Restrain the flow of" , "Staunch - stalk" , "'Stalk, shank (4)'" .)