Build up A-Team in speech (6)
I believe the answer is:
accrue
'build up' is the definition.
(I've seen this in another clue)
'a-team in speech' is the wordplay.
'team' becomes 'cr' (I can't justify this - if you can you should believe this answer much more).
'in' indicates putting letters inside.
'speech' becomes 'cue' (cue is a kind of speech).
'cr' going into 'cue' is 'ccrue'.
'a'+'ccrue'='ACCRUE'
Can you help me to learn more?
(Other definitions for accrue that I've seen before include "Collect" , "what interest payments do" , "Fall due; accumulate" , "Allow for (charge) at end of accounting period" , "Grow by addition" .)