Remembers sports grounds accommodating everyone (7)
I believe the answer is:
recalls
'remembers' is the definition.
('recall' can be a synonym of 'remember')
'sports grounds accommodating everyone' is the wordplay.
'sports grounds' becomes 'recs' (short for recreation grounds).
'accommodating' means one lot of letters goes inside another.
'everyone' becomes 'all' (I've seen this before).
'recs' going around 'all' is 'RECALLS'.
(Other definitions for recalls that I've seen before include "Brings to mind" , "orders to withdraw" , "Remembers" .)