Explain delicate manoeuvring about uniform (9)
I believe the answer is:
elucidate
'explain' is the definition.
(elucidating is a kind of explaining)
'delicate manoeuvring about uniform' is the wordplay.
'manoeuvring' is an anagram indicator.
'about' is an insertion indicator.
'uniform' becomes 'u' (phonetic alphabet: alpha, bravo, charlie etc.).
'delicate' anagrammed gives 'elcidate'.
'elcidate' enclosing 'u' is 'ELUCIDATE'.
(Other definitions for elucidate that I've seen before include "Shed light on, clarify" , "Shed light upon" , "Make clear, explain" , "Throw light on a problem, make clear (9)" , "Make clear and more comprehensible" .)