The Spanish and British propose to return gardening tool (6)
I believe the answer is:
dibble
'gardening tool' is the definition.
(tool for making holes in the ground)
'the spanish and british propose to return' is the wordplay.
'the spanish' becomes 'el' ('the' in Spanish).
'and' is a charade indicator (letters next to each other).
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'propose' becomes 'bid'.
'to return' is a reversal indicator.
'el'+'b'+'bid'='elbbid'
'elbbid' reversed gives 'DIBBLE'.
(Other definitions for dibble that I've seen before include "Small pointed tool to make holes in earth" , "Small pointed tool to make holes for bulbs" .)