Bird often held in cage or trap perhaps (6)
I believe the answer is:
parrot
'bird' is the definition.
(parrot is a kind of bird)
'or trap perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'or'+'trap'='ortrap'
'ortrap' with letters rearranged gives 'PARROT'.
'often held in cage' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for parrot that I've seen before include "Vividly coloured bird" , "Avian mimic" , "Repeater" , "Repeat automatically" , "A flighty creature" .)