Full-length uniform gets caught in fan (5)
I believe the answer is:
uncut
'full-length' is the definition.
('uncut' can be a synonym of 'full-length')
'uniform gets caught in fan' is the wordplay.
'uniform' becomes 'u' (phonetic alphabet: alpha, bravo, charlie etc.).
'gets' says to put letters next to each other.
'caught' becomes 'c' (cricket abbreviation**).
'in' indicates putting letters inside.
'fan' becomes 'nut' (I've seen this before).
'c' placed inside 'nut' is 'ncut'.
'u'+'ncut'='UNCUT'
(Other definitions for uncut that I've seen before include "total" , "having avoided censorship" , "Like diamonds, initially" , "(Of a diamond) rough" , "(Like a book) with pages not trimmed" .)