Tramps begin cycling? (5)
I believe the answer is:
tarts
'tramps begin cycling?' is the definition.
I can't judge whether this defines the answer.
'tramps begin cycling?' is the wordplay.
'begin' says to take the initial letters.
'cycling?' becomes 'arts' (I can't justify this - if you can you should believe this answer much more).
The first letter of 'tramps' is 't'.
't'+'arts'='TARTS'
(Other definitions for tarts that I've seen before include "Broads" , "Small open pies" , "Open pastries" , "cakes" , "Desserts" .)