Was blue bike seen here? (5)
I believe the answer is:
moped
This clue could be a double definition.
'was blue' is the first definition.
(past tense of 'mope')
'bike seen here?' is the second definition.
'moped' can be an answer for 'bike' (I've seen this before). I am unsure of the 'seen here?' bit.
Can you help me to learn more?
(Other definitions for moped that I've seen before include "Light motorcycle" , "dejected" , "Motor vehicle - languished" , "Vehicle - was blue" , "means of transport" .)