'I think the way he helps the team out defensively, we've seen an improvement there or we've seen him do more for us over the course of the season, ' Hodgson added.
Palace boss Roy Hodgson has stated recently that "it's inevitable we are going to lose a few good players in the summer", further increasing speculation that the Ivorian star will be leaving Selhurst Park at the end of the season after firing them to yet another great escape.
The Ivory Coast worldwide has been instrumental in helping the Eagles beat the drop this season and his impressive performances have caught the attention of several top Premier League clubs.
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James McArthur and Luka Milivojevic both went close with early efforts, as did Grzegorz Krychowiak for West Brom before, as has often been the case this season, Zaha was again influential and forced a fine save from Ben Foster.
The hosts finally got the goal they deserved on 70 minutes with the lively Zaha converting Patrick van Aanholt's cross from the left for his ninth goal of the season.
When Zaha then broke and sent Andros Townsend through one-on-one with Foster, the winger slipped as he struck, sending his effort wide.
Zaha also became the first Palace player to be crowned Premier League Player of the Month since 2004 after scoring four times and providing an assist during April.
In the 78th minute the result was put beyond doubt by Van Aanholt who rounded the keeper and drilled it home after excellent interplay between a number of Palace players.