Clue: Little growth in season once November's gone (5)
Answer: SPRIG
Explanation: Definition: Little growth
A subtraction: SPRI[n]G ('season') minus N ('once November's gone'; I cannot justify N by itself as an abbreviation for the month, so I wonder if the intent is that 'once' should indicate the single letter. I think that would still be dubious.) *As Flavia @1 points out, November for N is an entry in the NATO alphabet that I had forgotten. I note that another is one, for one. I must remember that.