Helping European recreational vehicle stuck in grass (7)
I believe the answer is:
serving
'helping' is the definition.
('serve' can be a synonym of 'help')
'european recreational vehicle stuck in grass' is the wordplay.
'european recreational vehicle' becomes 'erv' (this might be a standard abbreviation of which I'm unaware).
'stuck in' means one lot of letters goes inside another.
'grass' becomes 'sing' (I've seen this in other clues).
'erv' inserted within 'sing' is 'SERVING'.
Can you help me to learn more?
(Other definitions for serving that I've seen before include "Portion of food - being useful" , "Quantity of food for one person" .)