Drop from reserve team (7)
I believe the answer is:
subside
'drop' is the definition.
(thesaurus)
'reserve team' is the wordplay.
'reserve' becomes 'sub' (I've seen this in other clues).
'team' becomes 'side' (I've seen this before**).
'sub'+'side'='SUBSIDE'
'from' acts as a link.
(Other definitions for subside that I've seen before include "Wear off or die down" , "Diminish" , "(Of floods) go down" , "Become less intense" , "decline" .)